If you have a site or RV park lined up in the area where you plan on being before you head home , a lot of your questions would be best answered by a park attendant.
During that time , overheating of the coach in storage , should not be an issue, daytime temps mid 70s.
Overnight lows may get to freezing, but if I was doing the storage I'd do a system drain, and blow the lines. No A/F
Windows closed , vents cracked 1/4"
Insurance , you'll have to ask your company/carrier.
Power, depends on the facility.
Dry food, inside the coach , should be fine.
Your rodent protection plan sounds fine. Steel wool, don't forget the furnace intake and exhaust.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.