Sound advice above.

In addition, an excellent cooking source is sterno. The canned gel fuel. You can boil water with it. Best deal is to go to one of the warehouse stores (Costco, BJ's) and you can buy pro sized ones in 24 packs.

Freezing water is a good idea, make sure you leave room for the water to expand, even leaving the cap off/loose. Otherwise it can split the bottle/jug.

Consolidate freezers and refrigerators if you have more than one. A full fridge holds temp better than an empty one.

Just plan like you're going to be camping, because you probably will