What's Meant By Maximum Size?

Ratings depend on the park.. IN SOME cases it has to do with the tightenss of the turns in the park.. For example Grand Canyon south rim I have driven through it with a car.. I'm kind of glad I was in a car and not my 38foot motor home cause I'd never have made the curves.

IN a COE park I spend some time at on occasion my 38' Rig will fit a 28 foot site, well SOME 28 foot sites. (I drive a class A). but the site length is 28 feet. if I park on one of the shorter sites I need a ladder to take down the ladder I need to take my Bicycle off the rack (Short and long ladders)

Good site for working under the rear overhang area on the MH though. Pull up a chair and have a seat and do the repair.

Other sites.. Well if there is a tree in the way I need 38 feet.

And if I want to park the car in front of the motor home 45 or more.

I don't sweat the length restrictions too much. Often they say 30'. I say let me see. More often than not I can stuff my 36'LOA trailer in there & cram the long bed crew cab truck off the road too. I don't much care if the back 10' of trailer hangs out past the pad & maybe the stabilizers can't be used.

Trailer length, if you are confused ask the person at the RV park.:S

The first time I gave out our actual trailer lenght we were given a spot where the bike racks stuck out in the road. Now I add six feet when asked.

When I checked at the national parks out west it's the whole rigs length, TV and trailer. Does seem kind of odd though, I've got a 20' trailer and need a 40' site, which is usually the biggest.
From what I read here many ignore it and just go by their trailer size without issue.

What we have found is that the maximum length of the site is what the length of the sight is. If it is a 38 foot spot and you have a 38 foot unit then your vehicle will not fit. If it is a 48 foot spot then yes you will have to unhook and fit your vehicle in sideways or at an angle.