2026 Forest River Campsite Reserve18LM

The Campsite Reserve 18LM has 1,091 lbs of cargo capacity between 4,504 lbs dry and its 5,595 lbs GVWR, 19% of that rating; filling its 26-gallon fresh tank at 8.3 lb a gallon uses 216 lbs of it (how to read trailer weights).

Tongue weight is 495 lbs, 11% 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: 56 gallons of grey and black capacity against 26 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 3rd of 22 floorplans by dry weight, in a line that runs from 3,764 lbs to 12,380 lbs. It sits in the lighter third of the line.

Plan the tow on loaded weight, not the 4,504 lbs dry figure: half the published cargo capacity brings this plan to about 5,050 lbs, and the published GVWR of 5,595 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. 18LM is a Campsite Reserve designation and this site does not decode it into a layout claim.

How the 18LM differs from the other 21 Campsite Reserve floorplans. Most distinctive first. How these ranks are worked out.

• GVWR, 5,595 lb: second-lowest of 22, between the 16BC (5,531 lb) and the 17LS (5,625 lb).
• Cargo capacity, 1,091 lb: second-smallest of 22, between the 39JD (1,020 lb) and the 26CJ (1,253 lb).
• Tongue weight, 495 lb: second-lightest of 22, between the 16BC (431 lb) and the 17LS (525 lb).
• Length, 23 ft 9 in: second-shortest of 22, between the 16BC (21 ft 10 in) and the 17LS (23 ft 10 in).
• Dry weight, 4,504 lb: third-lightest of 22, between the 17LS (4,304 lb) and the 20LJ (4,688 lb).
• Tongue weight as a share of dry weight, 11%: fourth-smallest of 22, between the 39LA (10.7%) and the 23JW (11.2%).
• Cargo capacity as a share of GVWR, 19.5%: fifth-smallest of 21, between the 26RM (18.1%) and the 39IB (21.1%).
• Fresh tank, 26 gal: smallest of 22, level with the 16BC and 17LS; next are the 20JW, 39GB and three others (40 gal).
• Grey tank, 28 gal: smallest of 22, level with the 16BC, 17LS and 26CJ; next are the 19KR, 20AJ and eleven others (38 gal).
• Exterior height, 10 ft 9 in: eleventh-tallest of 22, between the 20AJ, 23JW and four others (10 ft 8 in) and the 16BC, 17LS and two others (10 ft 10 in).
• Black tank, 28 gal: smallest of 22, level with the 16BC, 17LS and seven others; next are the 20LJ, 26CJ and five others (38 gal).

Next to the 17LS, the nearest lighter floorplan by dry weight, the 18LM is 200 lb heavier by dry weight, has a GVWR 30 lb lower, has 230 lb less cargo capacity, has a tongue weight 30 lb lighter, is 1 in shorter and stands 1 in lower; the two publish the same fresh tank, grey tank and black tank.

Next to the 20LJ, the nearest heavier floorplan by dry weight, the 18LM is 184 lb lighter by dry weight, has a GVWR 1,985 lb lower, has 1,801 lb less cargo capacity, has a tongue weight 85 lb lighter, is 2 ft shorter, stands 3 in taller, has a fresh tank 26 gal smaller, has a grey tank 10 gal smaller and has a black tank 10 gal smaller.

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 26-gallon fresh tank is about 216 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 20% of the 18LM’s 1,091 lb cargo capacity, leaving 875 lb. Across 22 Campsite Reserve floorplans the water share runs 8% to 34%, and 5 give up more than this one. Nearest on that share: Campsite Reserve 39LA at 18% and Campsite Reserve 23JW at 24%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).