Camping with a 5th Wheel in Yellowstone Park

We stayed in Grant and Madison when we went a few years ago. We were there in the first 2 weeks in July and made reservations on the drive out there. It was snug with our 33' fiver , but not so much that I don't think a 35' wouldn't fit. I'm thinking we probably used 30' for our declared length. My model is a 285, so that means 29 feet right? Round to 30. I usually underreport at State and National Parks and overreport at private campgrounds.

Takes some maneuvering at times to squeeze in, but we always fit!

Hasn't bit us yet.