Ditto on the V10 pulling power comment. My friend here at work has a V10 and pulls a large fifth-wheel camping trailer with it. It does have a great amount of power, but his only complaint is that his fuel mileage completely and totally BLOWS.
He's getting about 8-9 MPG empty, and 6-7 MPG towing. One of his buddies has a Cummins RAM, and tows a similarly-sized fifth wheel trailer on trips. When they travel together, my friend had to stop for gas two or three times to the single fill-up of the diesel truck. The fillups were so often that he opted for a 55 gallon Transfer-Flo auxilliary tank in the bed, just ahead of his fifth wheel hitch. With 85 gallons of usable fuel capacity on-board, he can go the same distance as his CTD buddy with 30.
Greg