I have a 30 ft. Class C and tow a 2012 Chevy Sonic 4 wheels down. My son has a larger Class A and tows a Ford Escape on a dolly. We both agree that the tow bar/flat towing is better but both have their stressful aspects. My Blue Ox tow bar cost $1000 but its pretty easy and can just stay on the motor home with a cover when not in use. Never have to worry about where to store in in the campground or at home. Biggest problem is that you can not back up with either arrangement. Maybe a few inches with the dolly and none with the tow bar. Towing is a necessary hassle. Personally, I would stick with very small, light weight dinghys. The weight difference between my Chevy and a truck would be around 2000 lbs. My MH isn't rated to tow anything near that heavy and the little Chevy is enough of a load when it comes to accelerating and stopping.