Last time I was pulled over with a CCW the officer merely asked where it was, and asked me to keep my hands on the wheel. He never asked me for the sidearm, permit nada. I still got a ticket, but the professionalism was so high I actually called their boss to commend them.
YEARS ago a buddy was driving down to Sierra Vista while we were both on leave, with a car FULL of firearms, including my shiny new UZI Model B I had up in the front seat with me. Yes, not the smartest of moves, but I was quite young. I also had not yet discovered what a jammamatic that UZI really was. Edit to add, yes, it was legal.
We got pulled over, and I had absolutely no idea what to do, so I put my hands up on my shoulders like I was scratching the back of my neck, and kept 'em there. The officer saw what we had in the car, our milspec haircuts and clothes, smiled and gave my shipmate a speeding ticket for less than he was actually going. We "whewed" and went on, at a reduced velocity.