We checked the website frequently on cancelations ...

We checked the website frequently on cancelations the day there was a Star Party. Fortunately there was 1 cancelation that we immediately booked online($12,- pp). When we arrived the friendly staff also frequently checked for us on cancelations and that resulted in having a second ticket($15,- at the door pp) for the star party that evening. After the introduction you're able to look through at least 7 telescopes, with friendly staff at each telescope to tell you what you're looking at. There's also a presentation and a small film playing on a constant loop in the Visitor Centre.
The star party takes place in the Frank N. Bash Visitors Centre.
We had a nice evening and do recommend the Star Party!