One thing that's always stuck in my head is that you can't stock pile for the rest of your life. At some point you have to actively generate food. This is why I think 30 days supply is all you're going to need. If society breaks down completely, within 30 days everything is going to change. The strong and best armed will eat. Its no different than Somalia. Find the strongest guy you can stomach and join his gang. It'll be the best gig you can get.