I kind of skipped a lot in this thread, but I have packs of datrex bars I keep in my vehicles (along with a couple other odds and ends in case of emergency).........they might taste funny, but they fill the hole - and don't take up much room,last near forever and don't freeze. They are just basic calorie bars, something to keep you fueled in case of an emergency, but they come sealed up tight since they are meant for marine use like life rafts and such.