In my case I have a small pick-up. I store a portion of my bug-in supplies in the truck. Since I'm more catastrophic earthquake oriented, I like to have stuff with me all the time. If I'm home they're bug-in supplies; if I'm on the road or at work it's a 96 hour kit.

The most important element of the bug-out scenario is a place to bug-out to. Anybody can pack a car and leave home; where are you going to go?