[ChuckS]

I’ve traveled in temps at 15 below zero with our Alpine. It does not have heated tank heaters... I wasn’t able to dump so I ran the furnace and relied on furnace belly heat to keep tanks from freezing till I got into warmer weather.

And yes... the tanks will freeze at 15 below when towing at 60mph . Learned that lesson several years ago coming out of a snow storm in the mountains during an elk hunting trip with one of my toy haulers.