Stephen:

I tow an 8,000lb enclosed with my E450 chassis Class C. When I bought it I had the dealer upgrade the hitch to a full 10,000lb one, and confirmed the RV manufacturer had installed the frame extension to Ford specs, which preserved the original towing and GCWR. All my weigh numbers are below limits, as I have a small 24' unit on a chassis with capacity for 31'. Empty, I'm under 10,000lbs with a 14,500lb GVWR, and a 22,000lb GCWR. I do use a weight distributing hitch, as do just about everyone with more than 500lbs of tongue weight. My trailer comes in at about 1,000lbs on the ball.

Is the MH a diesel or gasser, and on what chassis? The only one I'd be hesitant loading up is a Chevy P30, but I know people that have pulled 28'ers with them.