Artum Snowbird wrote:
From seeing so much on here about fifth wheels and three quarter ton trucks, if you have a crew cab and need it for the kids.. you will want a trailer. It seems the trailer towing ability exceeds the fifth wheel capability for most three quarter ton trucks.
3/4 ton is usually about a wash between bumper pull or 5th wheel in terms of the max trailer weight.
1/2ton is where you can usually tow significantly more with a bumper pull (slang for a traditional trailer ball style hitch not literally one attached to the bumper).
To the original question, the length usually refers to the RV not the tow vehicle. Often it's expected that the truck will be parked crosswise at the front of the site to save space.
There is no specific definition for how to measure a site so if in doubt, give them a call but most parks won't have an issue with a 30' trailer.