I haven't been to Charlotte in several years, but if you want to run the track on Saturday nite you need to tell them at registration. They will give you a track pass. Most people get them even if they don't run, and sometimes you can pick up extra ones from friends or acquaintenances who get them but don't run.

Also as Allen stated, at registration get free passes for you kids. I always took my daughter and she was always free. I never left a car there, but I would not be surprised if others didn't do it. I know people leave their cars at other events. Not supposed to leave any tents/canopies up and I know for a fact that they will knock them down and they don't care whether or not they damage them.

Overall, Charlotte is one of my favorite events, lots to do, lots of places to stay and eat, and friendly people. Always a good trip.