I got this, but you also mentioned a timeline of about seven days in your original post if I recall correctly. I still think you're probably better with off the shelf foods rather than the Datrex/Mainstay and just rotating every few months. A week of food, a couple days of water and a cook set should each be about the size of a loaf of bread. I think if you want a week of food, I think a modular system would work best. The first couple of days of food and water in ready to eat foods in arms reach of the driver. Pouch spagetti and trail mix stuff. Then a cook kit, dry goods food and more water split up somewhere in the rest of the car.