Wow only one! That is a tough one. I would carry either an ESEE 6 because it is big enough to be a weapon and good chopping tool, or a modified lite machete. Both would be carried on my person so if I had to ditch my gear they stay with me. I tried to lay waste to Atlanta so that I could get pics of my gear being used in a post apocalyptic Atlanta but It's Friday I wanted to rest sorry.