I went to the first show three years ago. There are lots of Bs, more so than any other show I know of that you don't have to search out amongst all the other types of RVs. They are all on the arena floor. They will have a lot of so called B+s also.
2015 Advanced RV Ocean One Mercedes Benz Sprinter
Previous Class Bs:
2011 Great West Van Legend Sprinter
2005 Pleasure-way Plateau TS Sprinter