CamperHardlyKnowHer

Keystone Retreat 391FDEN

Travel trailerbuilt 2020–20Mixed build tierFindable on the used market
WHAT ONE COSTS
—price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap — treat any asking price against comparable models, not against zero.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~12,035 lbestimated as towed, for 2 people

dry weight 10,793 lb + fresh water (53 gal, full) 442 lb + propane + battery 200 lb + gear for 2 600 lb. Brochure dry weight omits water, propane, batteries and your gear; this estimate doesn't.

You want a tow rating around13,375 lb (10% margin)
GVWR (the sticker maximum)13,200 lb
Tongue weight, loaded~1,372 lb (11%)
Cargo capacity2,407 lb
WHICH TOW VEHICLES IT FITS — 21 OF 95

Judged the way the app judges: estimated loaded weight against each vehicle's rating less a 10% margin — per model year, because the 391FDEN's published weights held steady.

VEHICLETOW RATINGVERDICT
Chevrolet Silverado / GMC Sierra 2500HD (Duramax, max tow) '24-2622,500 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '20-2318,510 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '11-1918,100 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '20-2636,000 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '11-1923,300 lbfits, loaded, with 10% margin
Ford F-150 (3.5 EcoBoost, max tow) '24-2613,500 lbfits, loaded, with 10% margin
Ford F-150 (3.5 EcoBoost, max tow) '21-2314,000 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, gooseneck) '20-2222,800 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, tow pkg) '17-1918,000 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel) '11-1616,600 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 HO diesel, gooseneck) '23-2623,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '20-2237,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '17-1932,500 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '11-1621,600 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2638,000 lbfits, loaded, with 10% margin
Ford F-450 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2640,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins HO) '19-2620,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins) '11-1817,980 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins DRW, gooseneck) '13-1831,210 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '25-2636,610 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '19-2437,090 lbfits, loaded, with 10% margin
The 74it doesn't fit
  • Chevrolet Colorado / GMC Canyon (2.7 Turbo HO, tow pkg) '23-26 — over by ~5,105 lb loaded
  • Chevrolet Colorado / GMC Canyon (2.8 Duramax) '15-22 — over by ~5,105 lb loaded
  • Chevrolet Silverado / GMC Sierra 1500 (6.2 V8, max tow) '19-26 — over by ~65 lb loaded
  • Chevrolet Silverado 1500 (max tow) '14-18 — over by ~785 lb loaded
  • Chevrolet Silverado EV (4WT) '24-26 — over by ~785 lb loaded
  • Chevrolet Suburban (5.3 V8, max tow) '21-26 — over by ~4,565 lb loaded
  • Chevrolet Tahoe (5.3 V8, max tow) '21-26 — over by ~4,475 lb loaded
  • Chevrolet Traverse (tow pkg) '18-26 — over by ~7,535 lb loaded
  • Chrysler Pacifica '17-26 — over by ~8,795 lb loaded
  • Dodge Durango (5.7 / 6.4 Hemi, tow pkg) '14-26 — over by ~4,205 lb loaded
  • Ford Bronco 4-dr (2.7 EcoBoost, tow pkg) '21-26 — over by ~7,985 lb loaded
  • Ford Expedition (3.5 EcoBoost, tow pkg) '18-24 — over by ~3,665 lb loaded
  • Ford Expedition (3.5 EcoBoost, tow pkg) '25-26 — over by ~3,395 lb loaded
  • Ford Explorer (3.0 EcoBoost, tow pkg) '20-26 — over by ~6,995 lb loaded
  • Ford F-150 (3.5 EcoBoost, max tow) '11-14 — over by ~1,865 lb loaded
  • Ford F-150 (3.5 EcoBoost, max tow) '15-20 — over by ~155 lb loaded
  • Ford F-150 Lightning (max trailer tow) '22-26 — over by ~3,035 lb loaded
  • Ford Maverick (2.0 EcoBoost, 4K tow pkg) '22-26 — over by ~8,435 lb loaded
  • Ford Ranger (2.3 EcoBoost, tow pkg) '19-23 — over by ~5,285 lb loaded
  • Ford Ranger (2.7 EcoBoost, tow pkg) '24-26 — over by ~5,285 lb loaded
  • Ford Transit (HD tow pkg) '15-26 — over by ~5,825 lb loaded
  • GMC Acadia (tow pkg) '20-26 — over by ~7,535 lb loaded
  • GMC Hummer EV Pickup '22-26 — over by ~5,285 lb loaded
  • GMC Sierra EV '24-26 — over by ~1,235 lb loaded
  • GMC Yukon / Yukon XL (5.3 V8, max tow) '21-26 — over by ~4,475 lb loaded
  • Honda Odyssey '18-26 — over by ~8,885 lb loaded
  • Honda Passport (AWD) '19-26 — over by ~7,535 lb loaded
  • Honda Pilot (AWD, tow pkg) '16-26 — over by ~7,535 lb loaded
  • Honda Ridgeline (AWD) '17-26 — over by ~7,535 lb loaded
  • Hyundai Palisade (tow pkg) '20-26 — over by ~7,535 lb loaded
  • Hyundai Santa Cruz (2.5T AWD) '22-26 — over by ~7,535 lb loaded
  • Jeep Gladiator (3.6 V6, max tow) '20-26 — over by ~5,105 lb loaded
  • Jeep Grand Cherokee (5.7 Hemi) '11-21 — over by ~5,555 lb loaded
  • Jeep Grand Cherokee (WL, tow pkg) '22-26 — over by ~6,455 lb loaded
  • Jeep Grand Cherokee L (5.7 Hemi) '21-26 — over by ~5,555 lb loaded
  • Jeep Grand Wagoneer (Hurricane, max tow) '22-26 — over by ~3,170 lb loaded
  • Jeep Wagoneer (Hurricane, max tow) '22-26 — over by ~3,035 lb loaded
  • Jeep Wrangler Unlimited 4-dr (tow pkg) '18-26 — over by ~8,885 lb loaded
  • Kia Telluride (tow pkg) '20-26 — over by ~7,085 lb loaded
  • Land Rover Defender '20-26 — over by ~4,655 lb loaded
  • Land Rover Discovery '17-26 — over by ~4,655 lb loaded
  • Lexus GX 550 (tow pkg) '24-26 — over by ~3,850 lb loaded
  • Lexus LX 600 '22-26 — over by ~4,835 lb loaded
  • Mazda CX-90 (3.3 turbo, tow pkg) '24-26 — over by ~7,535 lb loaded
  • Mercedes-Benz Sprinter '19-26 — over by ~5,285 lb loaded
  • Nissan Armada (3.5 twin-turbo, tow pkg) '25-26 — over by ~4,385 lb loaded
  • Nissan Armada (tow pkg) '17-24 — over by ~4,385 lb loaded
  • Nissan Frontier (3.8 V6, tow pkg) '22-26 — over by ~5,600 lb loaded
  • Nissan Pathfinder (tow pkg) '22-26 — over by ~6,635 lb loaded
  • Nissan Titan (5.6 V8, tow pkg) '17-24 — over by ~3,250 lb loaded
  • Nissan Titan XD (Cummins diesel) '16-19 — over by ~595 lb loaded
  • Ram 1500 (3.0 Hurricane, max tow) '25-26 — over by ~1,585 lb loaded
  • Ram 1500 (5.7 Hemi eTorque, max tow) '19-24 — over by ~560 lb loaded
  • Ram 1500 (5.7 Hemi, max tow) '11-18 — over by ~2,475 lb loaded
  • Ram ProMaster '14-26 — over by ~5,815 lb loaded
  • Rivian R1S '22-26 — over by ~5,105 lb loaded
  • Rivian R1T '22-26 — over by ~2,135 lb loaded
  • Subaru Ascent '19-26 — over by ~7,535 lb loaded
  • Subaru Outback (XT / Wilderness) '20-26 — over by ~8,885 lb loaded
  • Tesla Cybertruck '24-26 — over by ~2,135 lb loaded
  • Tesla Model X (tow pkg) '16-26 — over by ~7,535 lb loaded
  • Tesla Model Y (tow pkg) '21-26 — over by ~8,885 lb loaded
  • Toyota 4Runner (4.0 V6) '11-24 — over by ~7,535 lb loaded
  • Toyota 4Runner (i-Force Max) '25-26 — over by ~6,635 lb loaded
  • Toyota Grand Highlander (i-Force Max) '24-26 — over by ~7,535 lb loaded
  • Toyota Highlander (tow pkg) '20-26 — over by ~7,535 lb loaded
  • Toyota Land Cruiser (i-Force Max) '24-26 — over by ~6,635 lb loaded
  • Toyota Sequoia (i-Force Max, tow pkg) '23-26 — over by ~3,465 lb loaded
  • Toyota Sienna '21-26 — over by ~8,885 lb loaded
  • Toyota Tacoma (i-Force Max, tow pkg) '24-26 — over by ~6,185 lb loaded
  • Toyota Tacoma (V6, tow pkg) '16-23 — over by ~5,915 lb loaded
  • Toyota Tundra (5.7 V8, tow pkg) '11-21 — over by ~2,855 lb loaded
  • Toyota Tundra (i-Force Max, tow pkg) '22-26 — over by ~1,235 lb loaded
  • Volkswagen Atlas (tow pkg) '18-26 — over by ~7,535 lb loaded
THE SPECS
Length40.9 ft
Height (incl. A/C)12.6 ft
Width8.5 ft
GVWR13,200 lb
Dry weight10,793 lb
Dry tongue weight1,230 lb
Cargo capacity2,407 lb
Sleeps4
Slide-outs3
Axles2
Fresh water53 gal
Grey water78 gal
Black water39 gal
Air conditioning15,000 BTU

A missing row means the maker never published that figure — unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× King bed(Permanent)72×80
  • 1× 72-inch sleeper sofa(Convertible)—
HOW IT'S BUILT — 2/5
WallsLaminated fiberglass
FrameWood
RoofStandard
UnderbellyEnclosed

Keystone (Mixed tier): Retreat Destination Trailer

YEAR BY YEAR — WHAT CHANGED
  • 2020Introduced
FINDING ONE

Findable — a few listed nationwide most weeks. Why: Keystone is a volume manufacturer; only one model year. Estimated from build volume and production span — not a count of live listings.

THE READ

Laminated champagne-sidewall version of the 39FDEN.

OTHER RETREAT FLOORPLANS
391CLDL · 15,790 lb · sleeps 9391FKSS · 13,350 lb · sleeps 4391FLFT · 14,000 lb · sleeps 7391FLRS · 13,400 lb · sleeps 4391FLSL · 15,655 lb · sleeps 6391FSRL · 15,700 lb · sleeps 8391HBDL · 15,655 lb · sleeps 9391LOFT · 13,925 lb · sleeps 6391MBNK · 13,190 lb · sleeps 7391MKTS · 13,925 lb · sleeps 4391RDEN · 13,470 lb · sleeps 6391RS · 15,655 lb · sleeps 439CLDL · 15,772 lb · sleeps 939FDEN · 13,200 lb · sleeps 4the whole line →
Is the 391FDEN your #1 — or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about — set your priorities as sliders and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

Data compiled from dealer and aggregator listings, retrieved 2026-07.