[Daryles]

I would go with a mix of generator and solar and batteries if you dont want just run the genny all the time.
Batteries are the hard (expensive) part, especially if you go lithium. I bought used Valence batteries (excellent deal) but you have to know what you are doing if you go that route. 6vdc golf batteries are probably easier to manage if you are not well versed with electrical/electronics and lithium batteries.
Also if you are stationary, look at insulation. Look at the air gaps under your frame. Use gorilla tape to close up small holes (keeps mice out too). Cover openings around the jacks (except for the propane tanks, they must have openings to vent any propane leaks).
Look at skirting your rig and some heat for underneath. Makes a big difference in heating/cooling. Good Facebook group for winterizing is "Let's stay warm together".