For those conditions I'd be thinking of building something myself. I'd want 3-4" of Styrofoam, like a cooler. Make like an igloo where a small amount of heat would keep it cozy. Keeping any water tanks inside the insulated shell. One access hatch for everything, double sealed and insulated. Your talking Alaska conditions, Brrr.
I love my HitchHiker II but not in those conditions, don't blame you. But have you considered finding 1/2 time employment in Florida?
Just thought of what you need. An ice fishing shanty on a truck. Somebody in Green Bay should have some plans.