There are a couple things on ETS that would help you make sure you have the right gear with you:

Recommended Auto Disaster Kit:
http://www.equipped.org/earthqk.htm#erthqkcarkt

Doug's blog entry on the Kim Family talks about Car prep:
http://www.equipped.org/blog/?p=43
(Shows a picture of what's in the back of his vehicle)

_________________________

- Ron