Dually necessary??
Charley & Donna,
If I was planning on fulltiming I would go no less than a 32 ft with slides. Most upper level units made for fulltiming will be heavy and (IMO) a dually would serve the purpose better. Duallys are harder to park and drive in town but, I never had a problem when we had ours. As Gary said tire cost and fuel are about the same. The dually will give you better braking and stability on the road. I also like the Ford power stroke but, don't tell anyone I said that because I am a Chevy person but, the Duramax has not been around long enough to prove it will be there for the long run. Most 3/4 tons are actually rated for more max tow than the dually but the dually will handle more bed weight. The 3/4 should be fine for anything under 30 ft.