Honestly man, if raiding and stealing from wal-mart is your go-to plan, than I suggest you really research what happened in New Orleans to those found stealing and looting.
If that is your plan, then yes I'm calling you a low life theif. Be a man and go buy the stuff now, and for your sake and your families sake I suggest you do some research and look at some of the busier preparedness boards around the internet.
I was, along with alot of other in New Orleans just before, during and well after Katrina. Unless you were there, you have no idea what was up. i have LOTS of video that I had to be extremely candid about taking. Thats locked off site in a vault for 50 years from now.
Stuff did hit the fan there...alot of lessons learned. It will happen again someday. I recommend everyone pay close attention.