We spent two years in Meeteetse living in our Sunnybrook most of the time. We were fortunate enough to be able to set up in a back yard which shielded us from a lot of the wind, and the daytime highs were better than you will have in Thermopolis. We had our water line insulated and heated, plastic over the inside of all the windows, but didn't close in the bottom. We would go to Worland to spend a few days a week with my wifes mother, then I would blow out all the water lines and drain the hot water tank. Other than taking a while to warm up the bed, it wasn't too bad. We did eventually get a heated mattress pad which made a world of difference. We used an electric heater whenever we were there along with the furnace.