That's an excellent question. Any fuel resupply may be problematical in a long term event. Maybe go dual fuel natural/propane unit would be best bet. If I weren't sitting in a pine thicket, solar would be my first choice, with propane generator as backup for those rainy/cloudy winter periods.I've been pondering about this: If there's a widespread power outage, what keeps the N.G. in the line pressurized? Is there a local, or far away pumping station? Will the pressure stop if no power(similar to county/city water)?