I owned a 2012 Jayco Jayflight 19RD TT with the thermal package. I camped in slightly below 10 degree F weather over night and traveled in cold weather just fine. My TT small and no slides so it was more than warm enough and no problems. Except: Yep, always a few problems. The black tank had the dump valve inside the insulation. The grey dump valve was out in the open. It will freeze. I made sure there was some RV antifreeze in the bottom of the grey tank covering the valve. The valves are the biggest problem. Check where your dump valves are located. If I had kept the TT I would have pulled off the insulation and changed the where the grey valve was located.
