That's what my sister did on the Gulf Coast in MS , after Katrina. They didn't have power for a week, and she cooked stuff from the fridge first, then the freezer. I think they had plenty all week. She did go through the line to get ice and water, but didn't need the MRE's they were offering.
After Fran everybody was grilling to beat the band....trying to eat the freezer food before it went bad. You couldn't find a bag of charcoal anywhere.