Hey great job man. I'm not going to jump on the shoe deal but want to impress the lesson you learned regarding water and reaching it. This is something that probably a couple dozen of us realized when you wrote it and should have mentioned before hand.

First, for two hours even in the rain, you did not drink nearly enough and in a SHTF situation your adrenaline will be much higher. You mentioned only drinking 16oz. Got to do better. Whether that be by moving Nalgene bottles around or using a hydration reservoir.

I also clip my bottles to the pack, as I have lost them on the trail. On a couple of my packs its pretty easy to reach and unclip with the pack on my back. On a few others I dummy cord the bottle with a couple feet of 550 cord so even if it falls out it drags behind to I figure it out.