Maybe not 30 below but better than looking for a log or rock to sit on. lol. Some of those cold hunting expeditions would plug me up for days. We had a failure in one of the shops I worked at. We had a portopotty sitting on the frame rack for a few days until the smell of medicated cherries forced us to move it outside. We put a little electric heater in there. wasn't too bad.
I'm glad you can use one toilet.