I feel that the best thing you can do is educate yourself and your family. Say you cut yourself deep, you don't know how to patch it. So you just do the usual and apply pressure and 2 weeks later your in agony with a horrible infection. Maybe you have antibiotics maybe you don't. So just say your right hand is infected and is your dominant hand. Can you shoot with your off hand maybe so or maybe not. This all could be prevented with knowledge on first aid, where if you or your spouse would of known to clean the cut, suture and monitor the wound. Also burns are quite common and a bad one can easily lead to an infection. Allergic reactions, do you have any? Have any small children? Know anything about first aid? So you got that covered what happens if you break down, no matter what we say there is no way you can ever carry every single part that could possibly fail. So your input shaft on your transmission breaks, your stuck in the middle of the desert. Do you have maps and compass, more importantly do you know how to use them? Also do you know how to find water, solar stills, terrain etc... Okay so everything goes right and you make it to your bug out area, have food stored? What if its compromised, know how to trap animals or do you use guns and let everyone know your there? There is a infinite number of scenarios pertaining to survival that's why its survival. So I would have to agree like stated earlier your back and your brain are the two most important pieces of gear, not to say all the other gear or supplies aren't important. So no matter your gear, weapons, or supplies with poor knowledge the littlest thing can take you down.