It also depends on what you are looking for. When I went to Oklahoma and back from Massachusetts, I stayed in a variety of places. My mental image was being outside with trees, maybe a brook, a picnic table and not at all close to my neighbor. I can stay in smaller places with my Aliner and still enjoy electricity and water hookups, even sewer some places. Reality was that the majority of places that were for TT were on grass and very close to the neighbors so that people mostly stayed inside. I also got 21 mpg so a 3 week trip for 4000 miles only cost me about $1000 counting CG fees and gas. Granted rain can be a problem but I have an awning I can set up in about 15 minutes. Not perfect but it's closer to what I am looking for.
