I don't suppose anyone thinks about automobiles in terms of being a large Bug Out Bag? Is your vehicle a big 4wd expedition backpack or a Mini Cooper fanny pack? Forget spaceblankets and buy more wool blankets. A spaceblanket in a car that can hold a quantity of wool blankets is like replacing a battleship with a Dinghy. Do not buy any foods in quantity until actually eating the stuff. If something tastes godawfull or gives you an upset stomach it becomes a PROBLEM and not an asset.