I am at a seasonal site, and stay here continuously. But others come on the weekend. All I know of leave their fridge on electric the whole time. Full timers leave them on full time. I would also in your circumstances. Like dagst1 said, leave it on auto and make sure you have propane in your tanks in case there is a power outage.
Steve & Sue
2017 Grand Design 297RSTS Travel Trailer
2017 Ford F-350 Lariat Crew Cab diesel 6.7 SW LB 11,500 lb GVWR package
Former: Crossroads ST26RB