You can have basically any Ford E series converted to 4wd. Not cheap but likely not more than buying one. Guessing $20k for a conversion?
Super Cs can be had in 4wd. Again, even the decent used ones are $100k or more.
Normal rwd dually C with the right tires all around. Think studded snows or siped, studded mudders will be quite capable. Although the last part of the run up to Crystal can be a bobsled run coming down.
Easiest and most versatile solution if 4wd is a must is pickup truck and a TC.
Add Tigers and any of the other small time overland type rigs, but none are cheap unless old and clapped out.
