Enough non ethanol gasoline stored to run the generator for a couple weeks. A tank or two of diesel stored as well. All vehicles are kept at least half full also.
Trying PRI-G to treat the gasoline this year. Historically have used a double dose of Stabil with good results, hoping I don't regret changing the recipe. Not sure how much difference stabilizer makes when the fuel is non ethanol and stored in air tight steel NATO fuel cans.
I did get lazy on the rotating and the last fuel was 3 years old when rotated. Still burned fine. Wouldn't consider burning ethanol fuel that old in any engine.