BS on the probable cause. State law doesn't require a person to notify.My father and brother are both LEOs, one a city cop and the other a deputy sheriff. They have both told me that if you are carrying when pulled over it is always best to be honest and upfront if you are carrying a loaded firearm.
They explained to me, that a lot of the newer LEOs have been trianed to be very cautious during traffic stops. If during a routine stop and officer noticed your weapon, and you did not notify the officer, that might be considered probable cause,to do more like search your car and generally cause you more trouble.
That is just opinions from a couple LEOs that I know and definitley trust. I do understand that all situations will be different and not all will end well. There is also a good chance that if you were stopped and did not notify the officer of your weapon that nothing will be noticed and therefore no problems.
Just my two cents.