Lot's of advice seems to be pretty general and doesn't necessarily apply everywhere.
I was stopped once, by Washoe Co. Sheriff, and the officer knew I had a CCW before he got out of his car----in Nevada, the dispather has that info instantly and informs the officer.
And I knew he knew it. By the time he reached my car, my window was down, hands on wheel, and I already had my wallet in my hand.
He asked me where my weapon was and I told him one was in the wasteband at 4:00 and the other in my inside vest pocket. He asked why I was so heavily armed, and I said I'm an 'ol retired geezer who's either getting parnanoid in his old age or smarter--didn't know which. He said "just asking".
At no time did he ask to see a permitt or a weapon.
He wanted my registration and I told him it was in the glove box. I asked for permission to reach in there and he asked if there was a gun in there. I said no and he said go ahead.
He asked why I was going so fast and I said I had no excuse---had my head where the sun didn't shine a whole lot.
He went back to his car, came back and said he was giving me a warning and told me to have a nice night. I said thank you and was on my way.
Laws are different in different places. If you're required to notify the officer of your weapon and show your permit, then do so.
If you're not required, and you just can't wait to let the officer know you're carrying, then go ahead. Doesn't seem to be a shortage of such "volunteers".
IMO, if your state is new to CCW, then use more co-operation and caution because LE isn't yet used to people like us carrying guns.
I think that if I had to reach into my coat for my license, because I wasn't astute enough to have it out already, then I'd let the officer know I'm legally armed and then ask him if I could reach in my pocket. As I said, he knows you're armed, and I don't know if they always ask first off where your weapon is. And, of course, never open the glove box (under any circumstances) if there's a weapon in there without first informing the officer and waiting for permission.