My generator is not portable but it would be easy to mount it on trailer. It uses the only fuel I can think of that is safe to store for extended periods - propane. I have a 15KW Generac hardwired to a transfer switch and supplied by a 500 gallon tank.

I believe if necessary we could survive an entire winter without resupply. I am now negotiating for an additional 250 gallon back-up tank. As long as I have propane, we will have water, heat, and lighting.