In our part of the country, it just depends on how crowded an area is. Anything over about 25 ft. limits you to less secluded areas that you could easily squeeze into with a smaller RV. The larger rigs seem to always be in an open field.
Now that we have a motorhome, even though it's small, we are much more limited because of ground clearance. All of our trailers were off-road height, and we could go just about anywhere. Now we have to be careful of exposed rocks and rutty roads.
2017 Melbourne 24k towing 2003 Jeep Wrangler
2013 Premier 19FBPR; 2013 Rpod 177 HRE
2011 Aliner Sport; 2008 Little Guy 5-Wide
1980 Shasta 21; 1981 Coleman Tent Trailer
1978 VW Westfalia; lots of tents