Good list. The only thing I'd add is a little food, like maybe a couple of power bars. You never know!
Great list you've made. Thank you. I second CountryDew's suggestion about food. Ever since a lady kept herself alive with a small amount of candy after her car flew off the highway in the middle of nowhere, and she was invisible to all and sundry passing by above her, I take a little food. Cliff bars, usually.