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Forest River Wildwood Heritage Glen 378FL

Fifth wheelbuilt 2020– (in production)Mixed build tierCommon on the used market
WHAT ONE COSTS
$86,700MSRP today

Still in production. A used 2023 would run roughly $51,100.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~12,864 lbestimated as towed, for 2 people

dry weight 11,589 lb + fresh water (57 gal, full) 475 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 around14,295 lb (10% margin)
GVWR (the sticker maximum)14,140 lb
Tongue weight, loaded~2,375 lb (18%)
Cargo capacity2,551 lb
WHICH TOW VEHICLES IT FITS: 19 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 378FL's published weights held steady. Fifth wheels also need a pickup bed and are held to the fifth-wheel rating where published.

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-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) '17-1932,500 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) '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 76it doesn't fit

These verdicts assume 2 people aboard with typical gear. See the margin for your truck and your crew →

THE SPECS
Length43.5 ft
Height (incl. A/C)13.5 ft
Width8.0 ft
GVWR14,140 lb
Dry weight11,589 lb
Dry tongue weight2,140 lb
Cargo capacity2,551 lb
Sleeps8
Axles2
Fresh water57 gal
Grey water62 gal
Black water30 gal
Air conditioning18,000 BTU
Awning20 ft

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

WHERE PEOPLE SLEEP
  • 1× Front bedroom queen(Permanent)60×80
  • 2× Large loft above the bedroom(Permanent)—
  • 2× Front living sofa and dinette(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Forest River (Mixed tier): Wildwood

YEAR BY YEAR: WHAT CHANGED
  • 2020Introduced
  • 2026Moved to dealer-stock-only status
FINDING ONE

Common: usually several for sale within a day’s drive. Why: Forest River is a volume manufacturer; still in production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Front living with a big sleeping loft; tallest plan in the line at 13'6".

OTHER WILDWOOD HERITAGE GLEN FLOORPLANS
246RLBS · 11,060 lb · sleeps 6266RLBS · 11,719 lb · sleeps 6276OK · 11,485 lb · sleeps 6286RL · 12,071 lb · sleeps 4291RL · 12,130 lb · sleeps 4295BH · 12,185 lb · sleeps 10296QBBS · 11,790 lb · sleeps 10316RKBS · 11,735 lb · sleeps 4316TBRD · 11,510 lb · sleeps 8320VIEW · 14,040 lb · sleeps 6321DRL · 14,025 lb · sleeps 4325RL · 14,085 lb · sleeps 6326BSTS · 12,415 lb · sleeps 4327RE · 12,195 lb · sleeps 4the whole line →
Find one for sale

Live listings for the 378FL on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

Inventory varies by site and day. Slim pickings? search the whole Wildwood Heritage Glen line ↗

Is the 378FL 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, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

Data compiled from manufacturer spec sheets, retrieved 2026-07.