I can't seem to get a straight answer on this, so I'll give it a shot here. I have to go to the post office every day. Am I okay to have my pistol in my car in the parking lot and leave it there while I run inside to check my box, or have I violated the law simply by driving in to the lot while carrying?
OK, you asked two questions, Yes to leaving it in your car, do not carry into the Post Office. No, you have not violated any law by driving into the parking lot with a CCW on your person or in your car.
Leaving it in your car, in the parking lot is fine. I do the same thing when I have to run into the kids' school or the post office.
The only time you can have a gun on school grounds, parking lot, or any area like that is if you are in your car, dropping off or picking up a child. If I were you, I would not admit to felonious activity on the internet.