misnomerga, I'd probably need a new pair of drawers if I had been sitting in the cop's car, WITH my gun, and got away with it!
I've been a passenger with my gun on a few occasions when the driver got stopped, of course there were no tickets or searches or anything. Been lucky so far, I guess. This has simply been a 'gray' area that I wanted the answer to for a long time. I reckon it will be as advised here, don't volunteer anything. Thanks for all the replies, guys.