A little preparation is better than none
There was a group of people who went to Louisiana and Alabama to help with the aftermath of Katrina. One of them said that those who prepared a little bit were able to get through the crisis better than those who did nothing. He recommended keeping at least half a tank of gas in the car at all times; half a tank will get you out of a disaster area better than a car with a quarter tank.
I have assembled a grab and go kit with the goal of surviving the roughly 72 hours before any help can be expected to arrive. I live in an earthquake prone area and being able to have some things like water purification tablets and emergency rations will help.
The best advice given is to form a small network with family and friends and work out ways to help each other and to determine locations to regroup.
