[MarkEHansen]

Perhaps I missed it, but I think the only information contrary to what folks are telling you here is what you're being told by the RV dealer (and to some extend, the truck dealer). It's unfortunate, but in my experience the RV dealer really doesn't have your best interest in mind - only his sale - and more than likely, a simple ignorance of the real weight limits involved in matching a trailer to a tow vehicle.

I commend you for taking the time to learn this stuff. I didn't do it until it cost me a lot of money. Perhaps you can safe yourself that problem.

Best of luck.