[Bill-N-Donna]

I don’t think I would leave the black tank open. There needs to be an accumulation of water inside the tank to keep the solids form becoming a problem. I would keep the black tank closed and dump it about every 3-4 days depending on the usage and how fast it fills up. After dumping the black tank that is a good time to add the chemicals which will help eliminate odors.

I’m not an expert on living full time in a camper but I don’t think I would leave the water running at night to keep the sewer hose from freezing up. I would close the grey tank at night and try to open it whenever the temperatures are above freezing.

Concerning the water line; I would try to keep the fresh water tank filled up and use the water from inside the camper. This might help eliminate the need to keep it heated and worry about it freezing.

Again, I’m not an expert on full timing. I don’t full time but this is some of the things I would consider if I had to live in it during cold weather. Hopefully some of the more experienced full timers will chime in here and will probably be able to give you a lot better advice than what I can.

Wish you the best!

On edit: A lot of this should be considered depending on the climate you live in and just how cold it will get where you are located! Basically, I think I would treat everything like I would if I were living in a house, anywhere it can freeze it will!
I don't know just how well the tanks will do but perhaps others will give advice on that.