Interesting question came up-
Yes this is a four wheel drive- but only high range. This hasn't stopped us from exploring a whole lot of Utah. We have done the eastside of the White Rime Trail, parts of the Shafer, Jack Bridger Trail, Mormon Pasture, John's Canyon and a whole lot more trails in the Moab Proximity.
As far as ski trailheads, we have backcountry skis and spend quite a bit of time off National Forest and BLM trailheads. The entire fresh, grey and black water are enclosed and have a seperate vent from the heater. So as long as we have the heater set at even the lowest setting- no freezing problems. We have been in -10 ******** in Montana. Though the entire vehicle is insulated, we leave the cabinets with water pipes open just to be on the safe side- no problems. Each propane tank last about 5-7 days depending on how high and cold. So two tanks, up to 2 weeks without a refill. Also, the propane and heater can stay on while driving.
Grey and black water can be dumped when well below freezing.