Dan .... great photo work, as usual! How do you keep your camera from freezing?
I assume that you maintained the inside of your trailer at night barely above freezing? (.... Or have you added enough battery power to keep your propane heater running a bit at night?)
Regarding your tip on recirculating hot water ... it reminded me: We have an outside shower just inside a storage cabinet that opens right beside the outside fresh water fill inlet. All I would have to do is turn the outside shower's hot valve ON (leaving the cold valve OFF), stick the shower head into a funnel stuck into the fresh water inlet and let it run. Wala .... hot recirculating water going into the fresh water tank. Thanks for bringing this up!
Cheers.