I cannot speak for Minnesota, but my son has a concealed weapons permit for our state. If stopped he is required to immediately tell them he has a concealed weapons permit and he is caring his gun. No matter if the gun is in the car or on his person. When he signed for his permit that is one of the things he had sign to say he understood it was part of obligation.
He was also taught in the class to never reach for the gun.
Each state is different. In the state I live in , you do not have to inform a police officer that you have a gun if you have a CCP. Same is true in Minnesota:
www.handgunlaw.us
1
Minnesota
Shall
Issue
Must Inform Officer by Law:
NO
Even if you don't HAVE to inform a police officer that you have a gun, I'd do it anyway if I was pulled over when driving if I had a gun in my car. I don't want to see the look on his face when he asks for my registration, I open my glove box to get it, and he sees a gun in there.
ETA: According to the link I have provided, you do not have to inform an officer in Montana
Montana
Shall
Issue
Must Inform Officer by Law:
NO