I'm going to do a rare thing and get all political now. Open carry "demonstrations" have been getting some attention in the press and I'm not against it (but some of the folks doing it are a bit out there).
If they were on way to or coming back from gun range or hunting it's probably safer to have them carrying their weapons then leaving them locked inside a vehicle.
Guns are only frightening when you only see them when a crime is being committed.
I was once with a big group of shooting enthusiasts we had a couple trucks but many of us were on motorcycles. We all piled into a McDonald's for breakfast on the way back to our rallying point. Many folks brought their weapon inside, some guys absent-mindedly as they had been wearing them for 45 minutes or so. I heard one of the cashiers (who looked worried) talking with the manager who replied to her along the lines of "This restaraunt has probably never been safer."
Law abiding citizens being law abiding citizens shouldn't be frightening or noteworthy.