I ALWAYS have cops following me at night, I have lots of bumper stickers on my car (THCBONGMAN can attest to it!) and I go 5 mph over the limit, and I obey ALL signs. It really isn't that hard!

I carry my stash in a baggie in a little slip under my headrest. I have been searched a few times before I knew my rights, and ridindirty is right, they don't want to tear your car apart, just glovebox, ashtray, under the seats, and in the trunk. That's it.