I work in a county owned building that is surrounded by a county park. There is a no weapons sign on my building so if I do decide to CCW I can't carry in my office. Unique to my building is that the 53 acres surrounding is a county park. The big park sign says no firearms. Can I keep my pistol parked in the car in where I work? There is no alternative parking since this park and my office are in a rural setting.