Nice piece of kit Mistwalker and a very nice write up.
Got a suggection, swap the EmergenC for Gatoraid packets, it has more of what your going to need in an emergency that the other stuff, you can still put in a packet of Vitimin C tablets if you want.
Also maybe a water bag like this http://www.bepreparedtosurvive.com/1 Qt. Emergency Water Bag.htm
And maybe an Aquamira Frontier filter to round out your kit.
Got a suggection, swap the EmergenC for Gatoraid packets, it has more of what your going to need in an emergency that the other stuff, you can still put in a packet of Vitimin C tablets if you want.
Also maybe a water bag like this http://www.bepreparedtosurvive.com/1 Qt. Emergency Water Bag.htm
And maybe an Aquamira Frontier filter to round out your kit.