CWO Durant...
As for what I carry? I use a camel back as my PSK, so obviously water. I'll throw some power bars or something similar in there (incidentally, don't eat lots without water, you get more dehydrated). IR chem sticks (probably 20 or so). I put my extra ammo in there, and a big ass knife as well as the IFAK they issue us (improved first aid kit). That's pretty much it, I figure if I go down, and I'm lucky/skilled enough to walk away, I won't be going far as the guys in back will most likely be messed up and we'll be staying there doing point defense until someone comes to the rescue (ala Takur Ghar).