You might be interested in this thread. It mirrors your question, the answers run the gamut from "you'll be OK" to "Nope, it is pushing too far".... Interesting is the OP's comment found near the end of the thread, after he tried, pretty much what you're wanting to do, and his final decision, even after adding all the "extras" including a $2500 hitch that's supposed to "make up for all the shortcomings".....
http://www.keystoneforums.com/forums...ad.php?t=28829