I've heard lots of discussion about hanging your food bag. Any ideas on how to hang your car?
http://www.njherald.com/290243416579919.php
Here is a photo of a bear in the back seat of my car at the Delaware Water Gap a few years ago.
The bear is kind of hard to see, but trust me the black shadow has fur. In the top photo its butt is hanging out of the window, and the in the second photo she is standing next to the car pondering how to peal down the closed window. It wasn't much of a challenge.
Moral of the story: Don't leave food in the back seat!