I have assumed that the National Guard would be there to begin food, shelter, and water distribution within 48 hours, so I always kept a 72 hour kit on hand. I still think that's the case but I've since expanded it to a 14 day kit. I live in a quake-prone area and frankly I do not want to be out there standing in line for necessities when there will be cleanup work to be done and relatives to look after.
We have not yet had a "big one" in my lifetime, but it's coming. <img src="/images/graemlins/frown.gif" alt="" />
Regards, Vince