I went through the snowstorm in new England last October/November. We went about ten days without power.
We learned our lesson.
We got a generator large enough for the house. We always have extra fuel. Every week I change out 1 five gallon contain into the truck and get it filled with new gas. Never more than four weeks old.
We always had plenty of food. But now we have radios, batteries, and extra lights.
Sometimes you learn easy, sometimes hard.
Nice that you have time and energy to do that but I never have trouble with two year old Stabil-treated non-ethanol gas (although if put in a vehicle you can detect a little ping under heavy load). And treated diesel lasts many, many years for me.