I keep a bottle of water too. Yes, I think realistically the only reason that I'm stuck that way is because of a blizzard. Melting snow is going to be the solution. In any case I think given I don't die right away, the best chance to be found and rescued is to have a radio transmitter device. So the cell phone, even when it doesn't work, is the next most valuable thing. There are tons of stuff we can do with the cell phone or ham radio. Kim was searched for, just that they couldn't find him. I think being searched for is the most realistic scenario if something like that happens to me.