We moved here after '98 so do not know anything more than 1-3 days w/out power. Here's what we do, and our house is all electric (no basement).

1. we have a wood stove that heats the house no matter the power situation.
2. we have a pretty good dry goods storage which includes a lot of veggies we grow
3. we have two trash cans that collect roof water for flushing toilets
4. we have a couple of lanterns
5. we have a butane burner stove for camping
6. we bust out coolers for food.
7. we have no generator
8. we have 5 gallons of drinking water

So far so good, but longer than 3 days we'd certainly start feeling it.

ETA, the biggest problem we had during one of the 2 or 3 dayers was when my son had a 60 gallon salt water tank. We were really sweating that, but it is since gone.