Granted being able to produce your own food stuffs is the way to go; however for the first few weeks after a disaster you will be in shock and it will take all you can do to carry on, that's when stored food comes in handy or if you have a crop failure your first year.
Offered by Mike G.
For those who might be interested this is a Food Storage Planner by the Mormons. It will give you an idea of how much is need for your family. Revelar, Inc. home page I think that it could be of help.
Offered by Pat.
This is year 2 in hydroponics for myself and you better have at least a 3 month supply of "shelf stable" food, because it takes at least that long to get things going and that really is a minimum. This assumes you do everything right. Hydroponics is chemistry and it takes practice. I strongly suggest you start practicing now.
Offered by John.