I live in Idaho and have CCW's for Idaho, Washington, and Oregon. In Idaho, the CCW is issued for carrying on your person, not in a car/truck glovebox or under the seat, and I suspect most states that issue them require the weapon to be carried. After all, the first "C" in CCW means Carry.
For those of you that lock your weapons in your car or truck, remember that if your vehicle gets stolen, you've just provided the thief with a weapon at no extra charge.
The only place I don't carry is in the court building in town (federal, state, and county) and that's because they have metal detectors at the doors. Other than that, I always carry.