The Sportsmobile location in Fresno specializes in 4-wheel drive vans for off-roading. For better info call Sportsmobile Texas and definitely look at the Sportsmobile website. It will tell you all the things that can be done and what they will cost.
I find the new Sprinter seats to be very nice. Drawbacks are the limited number of Mercedes dealers the cost of Mercedes parts. On the other hand, the vans are quite reliable and scheduled service intervals are 14 -15,000 miles.
Find out whether the vans you are considering come as passenger vans or work vans. The latter may have uninsulated bodies and will be like driving a tin can. A custom converter can put in windows, insulation, flooring, and AC (which will require 120V power, which is very common in campsites.)
