Last Spring I bought a hi-top Ford conversion van and turned it into a hunting camper/rv. Took out the 2nd row captain's chairs, and 3rd row bench seat. Built a single bed and installed it. Bought a 12v fridge/freezer. Already had camp chairs, Coleman stove, etc. Took it on a 3-week solo trip to ND/SD in Oct, and spent the first 2 weeks in it. (3rd week in a hotel in SD) Worked out great. Was nice having all my gear, clothes, food, etc with me at all times. Took my vacuum-sealer with me, so I was able to clean birds, package them, and freeze them right there in the van at the end of the day. Did make sharptail fajitas one day.
Had no problem going up and down gravel/dirt roads, and even some 2-tracks in a 2WD van. I never checked the numbers, but I think money-wise it came out about the same, getting 16 mpg and paying $10 bucks a night at a small city campground.....or getting 31 mpg in my small SUV and paying $70-90 for a room like I would usually do. I think I drove 7500 miles on that trip. I plan to take it on basically the same trip this year, and once to KS, which I also did last year. And then decide if I want to keep it, or sell it and go back to always staying in motels. I'll admit that after 2 weeks in the van, it was pretty great to be in a nice hotel for a week in SD.