In the pistol safety course I took last Friday, they made it quite clear that it was better to inform an officer if you are pulled over and carrying. It does make sense in some forms as to show you are not trying to hide it. One of the instructors told a story about how he (or a friend of his... can't remember which) was pulled over while carrying, didn't inform the officer who happened to be a rookie. The officer asked him to step out of the car and when he did, his arm brushed his jacket, revealing the gun on his hip, and the rookie officer went nuts. Drew his gun, pointed it directly at his face and couldn't hold the damn gun steady b/c he was shaking so much. An accidental discharge could easily have occurred and it would have been a bad day for all.
Not really sure what I would do when that time comes...
if asked to get out of the car/vehicle you put your hands on the steering wheel, in plane view and say "Officer, I am a licensed concealed carry holder and I do have a legal firearm on my person, HOW WOULD YOU LIKE TO PROCEED."
Then simply follow the officers instructions. It's good bet he will just ask you to keep your hands in view and not make any sudden moves. at this point it is quit possible he will hand cuff you when you get out of the vehicle ( he will explain that it is temporary and only for his safety, you will not be under arrest at that point) he will disarm you, make the weapon safe, and continue with his investigation
But to be honest, I have been pulled over for a traffic violations and I never informed the officer (except see below). once my car was full of rifle cases and hunting gear, the only thing the trooper said was, where you headed to hunt, I said near watertown, he said, nice country, there are some big deer up there........we had a nice conversation about hunting and camping, I thought I talked my way out of a ticket, I was wrong, LOL. got an 1180-D <crap>
Once I low sided my scooter (GL1800) when the cops showed up I handed him my DL and my CCW permit. he looked at my permit and said I have the Ruger LCP on me, he said ( Im not kidding, this is exactly what he said) "you sure, or do I have to go look through that nice ladies front yard for a gun" I smiled and said," nope I have it, it's the second thing I checked on, right after my wife" He said "Glad you said the second thing, Im pretty sure she is PO'd you dumped her" we both were laughing at that point. (except my ribs hurt like hell, LOL)