George,
I am a Thousand Trails member, have been for years, and I drive a coach that is larger than yours. There are some TT parks were coach size is a consideration, and my coach will only fit in about half of the sites, and others where almost all of the sites are large enough for my coach. So the area of the country that you travel in most is a consideration. Also, since there are probably a 100 different membership types, the locations and frequency of use have to be considered. Most TT parks are older and not up to Resort standards if that is your preference.
Normally, the most expensive TT membership is the one that you buy from the TT representative at the park as apposed to a resale, but they have some new membership for local areas that are competitive.
If you would like to discuss the pros and cons of a TT membership, just call me, 7132-54-4156
Gerald