For a few lights, some electronics, and a fridge (what’s really needed in SD unless you’re on a farm with well water), I’d go with a reputable 1500-2000W portable and a good-quality, long extension cable. i.e. 12 or 10 ga copper wire.

Do you keep gasoline around for yard tools? It can also be siphoned from a car if you keep the tank full — that way it will be fresh.