Cold weather travelling in Class A

I am a fulltimer, sometimes travel in below freezing temps - but never winterized, so do have to be mindful of plumbing. I put a remote sensor in the wet bay and the monitor on the dashboard - so we can check the temps. Anytime the wet bay temps get near freezing, we turnn on the furnace. Other times, chilly but not freezing, we will give the genny a workout and run a small electric heater. We also use the dash heat, warms the cockpit but that's it.