Can't really add to what others have said. You don't need to run the generator to operate the fridge or furnace on LPG.
We run our generator when traveling in very hot weather so we can run both A/C units as needed.
Good luck, happy trails, and God bless!
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD