As I said before, your rights don't include bringing arms onto the private property of someone else. If the Courts have ruled that arms in a car are not really on that property, then the Courts are every bit as guilty of parsing the language as was Bill Clinton.
I still want to know what to do with my pistol which I have the "right to carry" when I get to the front gate of the parking lot.
I understand you may prohibit me form bringing it into the building, but my car is my home away from home. Why should you be able to dictate to me what I keep in it.