How early can you come and how late can you stay. We will be booking through the park district. Are there any other restrictions? Is there free parking?

The park close at 9

There are parking meters. If you're having an event, it's best to check with office. Generally, event attendees have to pay for their parking.

Parking you pay buy meter. I don't know how early you can be there. We arrived at 9 am. I would check with Park with your other questions.