MRE's: Military grade pouches of food that will get you through. Make sure to pick up the ones that do not freeze. They taste like ass, but you won't die of starvation.
This Jason could probably take your head off with one punch, but all you gotta do is run and you’re good.
Stone Arrowheads: You can pick these up online and with some thread and sticks, make great hunting and defense companions. But a word of caution - be smart about the size of the ones you try and put in your carry-on.