Ran across this monster today. Way out of my, and most peoples budget, but still pretty cool imo. No affiliation, just thought i'd share.
I don't think this was designed as something you attempt Hell's Revenge in.. But I can see it being a VERY cool base camp where the party starts and the beer flows freely at the end of the day.The 4x4 Freightliner chassis (which I believe is called a P4) is very stout and capable offroad and on.
The only concerns I would have about this vehicle is the length of the wheelbase, and the durability of the slideout when exposed to lots of vibration.