Kim - You can get the equivalent of a Fast Pass for the Millennium Force. You get a hand stamp that tells you when to return so you don't have to wait in line so long. Just make sure to get the hand stamp (at the ride) early in the day. They go quickly. They also have the hand stamp at the Wicked Twister, but I don't know if you can have two handstamps at a time, even if they are for separate rides.
If you are staying at one of the CP hotels, you can get early entry (30 minutes before the general public) into the park. This can be a real benefit if you want to get on the Millennium Force ride first thing.
The lines at Cedar Point tend to get shorter near the end of the day. This is another benefit of staying until closing time. When we were there earlier this season, there was only a 15 minute wait for Wicked Twister near closing time.
Sounds like the perfect opportunity for another CP DISmeet!!!