It's just the two of us, both under 6'. We're looking to have a queen-size bed, some dressers/drawers, and at least a single stall shower. I'd like the rig to be mostly self contained, but I imagine RV hookups are going to be necessary (especially for the shower), and I'd like the versatility.
We're planning weekend-length excursions and the occasional two week trip (drive and park for two weeks, with RV hookups and other facilities).
Diesel seems to make sense, I might even try to explore the used fryer grease thing (if that's even realistic in this application). I doubt we'll need to tow, and while it isn't totally flat there aren't a lot of mountains where we're located.
Thing is we're totally ignorant to all things RV. We know people who have them, but we've never even as much as rented one. So I'm starting from scratch here.