35 years ago
when my family moved to Maine, it seemed like every pick-up truck I saw had a rifle rack in the rear window. It also seemed like every one of them had a rifle, usually a lever action 30-30, and a pump shotgun in them. Most of those same pickups were never locked and you never heard of anyone's guns being stolen. Sadly, all of that has changed. You almost never see a gun rack in a pick-up anymore and, when you do, it is either empty or holding a level or fishing rod, and the doors are locked when unattended.
My f-250 is generally equipped with a Mossberg 590, a bandolier of shells, and a Saiga with two mags of ammo, behind the seat. I have a three gun carrier strapped to the seats of my Toyota Matrix which usually hold an AR-15, an 870 and, some other rifle. I also carry 3 mags of ammo for the AR and a bandolier full of shells for the 870. Depending on what third gun is, I will have appropriate ammo for it. I don't worry about guns getting stolen, it hasn't happened in 20 years, so I just don't worry about it. I also usually have at least one spare handgun in the vehicle in addition to the one I carry on my hip at all times, a 1911. I have a had to dispatch an injured deer once. The reason that I keep guns with me all the time is mostly so I can go shooting when the opportunity presents itself.