Well... Back in the good old days the best online service was Compuserve. Compuserve hosted HAMNET, which was the best online network for hams. There was also an excelent RV Forum on Compuserve. However things changed, Compuserve as we loved it no longer exists, though SOME of the forums are still there. (The host is no longer compuserve, it is Prospero and it's an AOL Web Property) many of the forums also jumped ship.
The RV forum went here
http://www.rvforum.net
Which my software suggests is a Yahoo forum however it does not look like one Our host Tom runs a nice forum. Somewhat small but very friendly and if you need help we have about a thousand years of experience between us (if not more) and of course we like to rally in QZ every year if we can, alas, baring a miracle I won't be there next January. but I'm hoping to return in 2009