I agree, particularly at national parks where they like to put wooden posts and knee high boulders lining the RV sites. See this photo of our "27 ft max" space at Mather campground at the grand canyon, the site was actually about 75 feet long, however it was lined with knee high rocks, as well as trees just off the edge of the pavement and was curved, plus the entry was a left turn while going around a left bend in the lane. I had to back and cut once in order the get into the site in our 28 ft (29'5" bumper to bumper) class A coach. A 31 ft coach might have fit in there, but I doubt anything longer could have made the entry turn. See how close our left front corner was to that rock, and how close our right side mirror was to that tree, I was worried I would have to back out of that site when it came time to leave, but I was able to inch forward while turning and not hit anything, (these are the sorts of sites where you have to be very aware of off tracking and tail swing)