CampFit Atlas

RV fit calculator

Type your rig, type a driveway length, and see the two drawn to the same scale. Every rule and every assumption is on this page and you can change each one.

1. Your rig
2. Width and slide-outs
3. The site

On Recreation.gov the number you want is Driveway Length on the campsite page; when it reads 0 the site has not been measured and Max Vehicle Length is the only limit published. How those two numbers differ.

Does not fitA 40 ft driveway is 8 ft shorter than the 48 ft rig.

Overhead view: a 19 ft tow vehicle, 3 ft hitch gap and 26 ft trailer on a 40 ft driveway, to scaletow vehicle 19 fttrailer 26 ftdriveway 40 ftcombined 48 ft01020304050ft
tow vehicletrailer or motorhome body, slide-outs in lighter inkfitstightdoes not fit, overflow hatched
Combined length
48 ft
Required driveway (rig + margin)
53 ft
Width with slides out
8.5 ft
Spare driveway
-8 ft

Your rig against every verified campground

The driveway box above answers one site. This table answers the other question, the one you have before you open a reservation screen: of the campgrounds whose limits this site has verified, which ones publish a figure your rig is already outside? Each row compares the right figure to the right measurement and names the figure that decides: a maximum trailer length against your trailer alone, a maximum combined length against the whole rig, a maximum RV length against a motorhome. Where a page publishes a trailer figure that figure is used for a trailer and the RV figure is not, because Recreation.gov states the trailer maximum is lower on purpose. The 5 ft margin is not applied here: a published limit is the park's number, and adding our margin to it would invent a stricter rule than the park states.

8 of 12 verified campgrounds publish a figure your rig is inside.

CampgroundParkPublished figureYoursVerdict
Bridalveil Creek CampgroundYosemite National Park24 ft max trailer length26 ft trailerDoes not fit
Tuolumne Meadows CampgroundYosemite National Park24 ft max trailer length26 ft trailerDoes not fit
Upper Pines CampgroundYosemite National Park24 ft max trailer length26 ft trailerDoes not fit
White Wolf CampgroundYosemite National Park24 ft max trailer length26 ft trailerDoes not fit
Crane Flat CampgroundYosemite National Park35 ft max trailer length26 ft trailerFits
Fishing Bridge RV ParkYellowstone National Park95 ft max combined length48 ft combinedFits
Hodgdon Meadow CampgroundYosemite National Park30 ft max trailer length26 ft trailerFits
Lower Pines CampgroundYosemite National Park35 ft max trailer length26 ft trailerFits
Mather CampgroundGrand Canyon National Park (South Rim)30 ft max trailer length26 ft trailerFits
North Pines CampgroundYosemite National Park35 ft max trailer length26 ft trailerFits
Trailer Village RV CampgroundGrand Canyon National Park (South Rim)50 ft max RV length26 ft trailerFits
Wawona CampgroundYosemite National Park35 ft max trailer length26 ft trailerFits

Verdicts cover length only. "Tight" here means your measurement equals the published figure exactly. A campground that accepts your length may still have no site of that length free, and this site never says whether a site is available — the figures and their sources are on each campground page. Campgrounds that publish no facility-wide figure are not in this table; they are listed with the reason on the index.

The rule, stated

Combined length is arithmetic on what you typed: tow vehicle + hitch gap + trailer. The margin is ours: 5 ft by default, so the tow vehicle's nose is not on the loop road and the rear door can open. It comes from no source and you can set it to zero. "Tight" is the band between the bare rig and rig plus margin.

Assumptions you can change

InputDefaultWhy that default
Hitch gap (travel trailer)3 ftRear bumper to the coupler on the ball. Depends on your receiver and tongue; measure yours hitched.
Fifth-wheel overlap4 ftThe length of trailer that sits over the truck bed and is subtracted from truck plus trailer. Depends on where the pin sits in the bed.
Tow-bar gap (motorhome + car)3 ftRear bumper to the towed car's front bumper with the tow bar extended.
Body width8.5 ftA common RV body width before mirrors and slides. Replace with your spec sheet.
Slide depth3 ftTypical extension of one slide-out. Replace with yours.
Safety margin5 ftEditorial. Room to open the rear door and keep the tow vehicle's nose off the campground road.

Width is reported but not judged: almost no official page publishes site width, so the calculator shows your width with slides out and leaves the comparison to you. Yosemite, for example, publishes only a maximum RV length and maximum trailer length per campground (Upper Pines: 35 ft and 24 ft).

What this calculator does not know