I live in the desert.....Yuma, Az. I went backpacking in the Cabeza Prieta wildlife refruge several years ago and I made up a hobo meal wrapped in foil, I precooked it, and froze it. Then I wrapped it up in several layers of news paper as insulation. The day of my trip, I packed it last. I took off the newspaper which I used as kindling for my fire. when I had coals I put my packet on the coals to warm up. I must say that my packet was still partially frozen at supper time. for the hobo I used a ground beef patty and some chopped up onion and cabbage as the veg. Everything tastes better over a camp fire.