or visit http://www.coasterqueue.com/ and check out the wait times for the rides. That usually gives a decent indication of the crowds at the park.

I know this thread is a bit old but I've been working on a website that aims to answer the very question that was asked. Its a bit rudimentary at the moment but I have plans to add more detailed information. I'm also open to suggestions. Here is a link to the details for Maverick. It shows the histo...