Get those sun ovens out and practice with them now instead of later. They are a great help when the power is out, I used mine all summer for cooking and baking to save on the bills. Wish I had had one years ago during some of the disasters! I used mine for main courses and some deserts.
I didn’t buy one of those camping ones since I have a family to feed. Intend to practice with it now that the snow is on the ground to see how long it takes in the cold. Having been through a few things I know a hot meal in stressful times can be quite comforting and stress reducing.
Additionally there is no smoke and no strong odors to give you away when food is in short measure.