the best thing, i my opinion is to just learn to be able to live off the land. in the event of any kind of break down in society, you my have to gather your own food and many other things.
first off, you can forget about going to the grocery store. even if you have food stocked up, if the disruption last to long supplies will run out. ditto for ammo. that is where a good flint lock rifle comes into play. it only takes 3 ingredients to make your own black powder, charcoal, saltpeter, and sulfur. wheel weights can make an excellent source of lead for making your own round balls. pouring hot lead from some height into water makes some crude shot.
as for getting away far enough from everyone, just don't think it can be done in this day and time. best a person could do is find the roughest territory you can find and hope it is enough to make people not want come in there.
learning what nature produces for us to eat and getting back to the hunter-gatherer state of mind will probably be one of the most essential things to making it through some forms disaster. knowledge will be our best offense an defense.