I know there are lot of strategies for survival when things hit the rotary impeller. One that I have always maintained that could be as useful as a firearm of a bladed instrument is a good complete first aid kit. The more complete the better. Lets look at a possible scenario.
You are making your way from point A to point B and through no fault (bad fucking luck)of your own you get intercepted by some bad guys. While the bad guys are taking your stuff they find a large complete trauma first aid kit. You now start your spiel about how you are a trained EMT and you need it to provide first aid to injured people on the way. Now these bad guys don't know shit about first aid but they are smart enough to know that they are going to need medical aid at some point in the near future. So it is advisable not to screw with the guy that may save your life.
Second scenario. You are making your way to where you need to go. You come across some other people who are also on the road. They see you are carrying a large trauma first aid kit and they ask if you can help with some member of the group is injured. Of course you can and you do. This now creates a instant bond with the group. They know you are not a danger to them. Also you tell they where you might be found in the future, they will store that information. If they know that medical help can be found at camp Z they will come there for medical assistance. Along the way they will collect supplies and information. At camp Z they will be able to exchange supplies and information for medical assistance. This now sets you up to be a supply point and a information center for people living in, or traveling through your area.