I suspect there are NO THaulers that will function really well in that climate. We do use ours to snowmobile, so colder than most folks. I have cut and installed 3/4 inch styrofoam panels in every window. 2-inch think panels in every possible attainable floor joists from the basement areas. Even some scrap 3/4 against outside walls in the cab inets(wife can't see them, usually). 100 lb extra propane in garage, two ceramic electric heaters, one in living, the other upper level. Shovel 3 feet of snow around the outside to keep the Wind from dropping temps too fast...AND...you can survive. One trip, did NOT fill the frame water tank. Instead, I used the winter by-pass hose to suck water from plastic tank. Could at least flush the stool and sponge bath with hot water off stove. One does what one has to do to enjoy our toys....year round
) Merry Christmas. Johnny Rocky Mt of Colorado.