RV Forums
RVForum.net
This is a great rv forum. RVForum.net claims to be "the friendliest place on the web for anyone with an RV or an interest in RVing." and I agree with them.
Mikenchell.com-Teardrops and Tiny Travel Trailers Forum
Want to design one? Want to build one? Want to buy one? Want to restore one? Want to camp in one? What ever your interest, we'll talk about it on our forum.
Irv2.com/forums
Big forum
RV.net/forum
This is a big forum. Has a corporate feel.
Rvtravel.com/rvforum
Small forum. Not as many posts as other forums.