Hi Steve,
the Skarosser / Nordstar campers are surely some of the best for cold weather.
Living in the camper off the truck for an extended time, the camper should be supported under the floor so the weight doesn't all rest on the jacks.
The front jacks on these campers are prone to develop leaks and, subsequently, rot. Maybe not in these cold temperatures ... but I imagine many freeze /thaw cycles would not be beneficial.
My main concern would be to keep the propane system running at all times, and to have access to sufficiently warm propane throughout. I guess once something freezes, it will be near impossible to get it running again until everything has warmed up. Says the guy who was without heat in zero celsius because of a frozen (non gaseous) butane bottle. Lesson learned there.
If the heater goes out, your friend will be very very cold very quickly - they need to have a plan for that.
The Skarosser may have the Alde liquid/water heater. I don't know how far the antifreeze in there goes, but I would clarify beforehand.
I am not sure if it will work, but I have no personal experience with that sort of cold. Someone from our german forum took one of these up to sweden over winter a couple of years ago and they ended up in a fixed building. But I know no details.
