volunteer NOTHING. Cops are not your friend. (My wife is a retired LEO)
When driving cross country, avoid big cities and anti-gun states unless you have CC permit from THAT state or have ironclad documentation of reciprocity.
Never carry the gun on you unless exiting the car for an extended period.
I figure my NRA Life Member decal is enough of a flag and avoid "giving them more."
Finally and obviously...don't speed, don't drink and drive and make sure all your lights work. "The nail that sticks up gets hammered down."