2026 Forest River Campsite Reserve39IB

The Campsite Reserve 39IB has 2,961 lbs of cargo capacity between 11,039 lbs dry and its 14,000 lbs GVWR, 21% of that rating; filling its 40-gallon fresh tank at 8.3 lb a gallon uses 332 lbs of it (how to read trailer weights).

Tongue weight is 1,100 lbs, 10% of the dry weight as published; it rises as the trailer is loaded and counts against the tow vehicle’s tongue-weight and payload limits (tongue weight by size).

Off hookups: 150 gallons of grey and black capacity against 40 gallons of fresh water, so fresh water runs out first (tank sizes by length).

Against the rest of the Campsite Reserve roster this is the 20th of 22 floorplans by dry weight, in a line that runs from 3,764 lbs to 12,380 lbs. It sits in the heavier third of the line.

Plan the tow on loaded weight, not the 11,039 lbs dry figure: half the published cargo capacity brings this plan to about 12,519 lbs, and the published GVWR of 14,000 lbs is the limit (how to read trailer weights).

Forest River’s line listing and this floorplan’s own factory page agree on all 4 shared figures. Dry weight plus cargo capacity equals the published GVWR exactly. A missing row means Forest River does not publish that figure (how figures are verified).

Forest River publishes no floorplan description for this plan in the channel this page is built from - only the numeric specification block. Rather than describe a layout from the floorplan code, which would be a guess dressed as a fact, this page carries what the factory publishes and says where it stops. 39IB is a Campsite Reserve designation and this site does not decode it into a layout claim.

How the 39IB differs from the other 21 Campsite Reserve floorplans. Most distinctive first. How these ranks are worked out.

• Tongue weight as a share of dry weight, 10%: smallest of 22; next is the 26CJ (10.5%).
• Length, 44 ft 6 in: longest of 22; next is the 39LA (43 ft 9 in).
• Black tank, 70 gal: second-largest of 22, between the 20JW, 39GB and 39LA (40 gal) and the 39JD (80 gal).
• Dry weight, 11,039 lb: third-heaviest of 22, between the 39GB (8,919 lb) and the 39LA (12,194 lb).
• Cargo capacity, 2,961 lb: third-largest of 22, between the 20LJ (2,892 lb) and the 28SW (4,047 lb).
• GVWR, 14,000 lb: highest of 22, level with the 39LA; next is the 39JD (13,400 lb).
• Exterior height, 12 ft 7 in: fifth-tallest of 22, between the 19KR (10 ft 11 in) and the 39GB (12 ft 9 in).
• Grey tank, 80 gal: largest of 22, level with the 39JD; next is the 39LA (70 gal).
• Cargo capacity as a share of GVWR, 21.1%: sixth-smallest of 21, between the 18LM (19.5%) and the 20JW (21.7%).
• Tongue weight, 1,100 lb: sixth-heaviest of 22, between the 20JW (1,005 lb) and the 32GT (1,120 lb).
• Fresh tank, 40 gal: shared with the 20JW, 39GB and two others; of 22, three smaller and fourteen larger, nearest the 16BC, 17LS and 18LM (26 gal) and the 19KR, 20AJ and twelve others (52 gal).

Next to the 39GB, the nearest lighter floorplan by dry weight, the 39IB is 2,120 lb heavier by dry weight, has a GVWR 745 lb higher, has 1,375 lb less cargo capacity, has a tongue weight 155 lb lighter, is 3 ft 11 in longer, stands 2 in lower, has a grey tank 40 gal larger and has a black tank 30 gal larger; the two publish the same fresh tank.

Next to the 39LA, the nearest heavier floorplan by dry weight, the 39IB is 1,155 lb lighter by dry weight, has 1,155 lb more cargo capacity, has a tongue weight 205 lb lighter, is 9 in longer, stands 11 in lower, has a grey tank 10 gal larger and has a black tank 30 gal larger; the two publish the same GVWR and fresh tank.

Campsite Reserve is the widest single Forest River travel-trailer roster this site carries: dry weight runs 3,764 lb at the 16BC to 12,380 lb at the top of the loft group, and cargo capacity runs 1,020 to 4,336 lb. Tongue weight runs 431 to 1,425 lb and GVWR 5,531 to 14,000 lb. The loft plans are where the weight is -- the 39-series sits at the top of every column -- and the three toy haulers sit in the middle rather than the top, which is unusual for a line that carries both. Twenty-one of the twenty-two profileable plans tie out exactly against dry weight plus cargo capacity. The exception is 23TS, whose own arithmetic gives 7,795 lb against a published GVWR of 7,805; it is published on its own page with that disagreement stated rather than profiled with the rest.

A full 40-gallon fresh tank is about 332 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 11% of the 39IB’s 2,961 lb cargo capacity, leaving 2,629 lb. Across 22 Campsite Reserve floorplans the water share runs 8% to 34%, and 19 give up more than this one. Nearest on that share: Campsite Reserve 28SW at 11% and Campsite Reserve 16BC at 12%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).