OK. Skoolie it is. Have you seen the skoolies that were used in the Outback commercials? There were two of them, a Ford and an IH. Way too cool! They have 4WD and off road tires and lift kits.
All you'd need is an out of service 4WD boom truck like so many power companies use and strip out the front drive and transmission/transfer case. Probably want the drive axle too so that the ratios and wheel lug designs match. Then you could really get into the "choice" parking areas. This would be a really interesting project for someone with the ability to handle the transmissions and axles.
We go to cross country and motorcross races and this sort of contraption would be ideal...my young'n can do this one...done mine...more or less.
Dream on! JR