You may want to rethink the propane idea, especially since it's a dual fuel generator.
A several years ago we had blizzard sweep through here, the wind and ice knocked out lights and phones all over several counties, the interstate was even shut down for three days. We went 7 days without electricity and 10 days before the phones came up.
I've got about 10 gas stations within 10 miles of my home - all of them had gas in the tanks, but not a one of them had a backup generator, so the gas stayed in the tanks. If you wanted to buy anything else, you had to use cash or check, no credit or debit cards since the telephone lines were down.
Fast forward to just a few years ago, we had a freak wind storm blow through here, once again, no electricity, no phones and none of those gas stations had a backup generator, so another 6 days in August with no electricity. People had to throw out a literal ton of food they'd stored in their freezers and refrigerators.
Propane stores much better than gasoline and with all the other LP thingies I've got, I now have a total of 2 30# tanks and 5 20# tanks, plus if push comes to shove, I've got a 500 gallon tank in the back yard.
Even if you didn't have spare tanks, almost all gas stations exchange LP cylinders now. Granted, they're not the cheapest, but if you can't get gasoline because they can't pump it, you can still pay cash or check and they can unlock the cage with the cylinders for you.
I've got a LP gas stove and furnace, we're on city water service. All I need electricity for is for freezers and refrigerator, plus the blow motor in cold weather.
I'd get three days running a 20# tank, keeping a refrigerator and two freezers going. I didn't run them all the time, just for 1 out of 4 hours, - that saved me a lot of money simply because I saved my foodstocks, plus we had icecubes for all the cold drinks we were going through in that hot weather.
If you have a dual fuel genny, you can run gasoline when you have it and keep your LP stashed away for the bad times.