I had a camper on an F350 SRW for a while. Even though it was only 8' long - it all fit in the bed of the truck - the top-heavy feel and lean scared the dickens out of me whenever I got on some off-camber two-track. Couple times there I was sure we were going over! Now I've got a bigger camper on a dually and the added stability of those two extra tires acting as outriggers out there just amazes me. I drive those same roads as before and never feel like I'm going to roll it. It took only a few trips to convince me a dually was the way to go with a cabover. Sure, you have to be a bit more careful because of the extra width but the extra stability is well worth it!