Have you ever looked into the teachings of the Mormon faith? They advocate strongly a 'prepping' mentality. As a matter of fact, a person interested in prepping could learn a lot from them in that area.
Before I became an apostate I was a pretty good Mormon. Year's supply of everything. They had that self reliance thing figured out. Within the leadership in Salt Lake they even have plans for a monetary system in case of total failure. And a mechanism for replacing the government if need be. Oh, and the place where they store their geneological records among other things, engineered to withstand an atomic blast. Of course they don't say that publicly. Cool stuff.
http://blog.longnow.org/02007/04/09/the-granite-vaults-of-geneology/