We met a fellow blogger (John) in the campground today. He's a helluva nice guy and very inginuitive. He outfitted a 6 x 14 cargo trailer to make it comfortable for "full timing". He has everything in it that you could need... except insulation and he's working on that.
Stealth to the MAX!
He not only has solar (for free energy on the sunny days), he has a wind turbine (for the windy days). He says when it isn't sunny, it's usually windy. That makes sense to me!