I think the best chances will be for whole communities to form like the communes of the 60's with different people bringing different survival skill sets.
Sounds like a trip to the JFSAG board http://investorshub.advfn.com/boards/board.asp?board_id=181 and ask ThatHawaiiGuy to post some of his lists of that topic. I think that is where I've seen some good info on things to start buying etc.