Susan,
My wife and I have recently been pondering the same thing. We have been watching the Documentaries on CNN, and the "You Were Warned", one took us back a bit. It was based on a report OUR Gov did on Oil reserves.
On this basis, we are looking at setting up to do one of two things, Shelter in Place, or Bug Out. The only thing that we Both heavily agree on is the idiocy of the Gov's idea that you should be self sufficient for 3 days.....I have one word in response to that ....Katrina!
We both agree that 30 days would be more realistic.....and infinitely safer for the both of us. We are both Disabled, I am a Vet and she has had some serious health problems in the past. With all this in mind, and the restriction of a fixed income (Mil. Vet), we are still working towards that 30 day goal. We want to be Totally self sufficient......not waiting in the dark for an Army Cargo truck to come by and throw us an MRE and a bottle of water! If any of you Great people have any idea's or tip's, I'll gladly take them in mind!

Krell