Well, I'll add my two cents.
Stay @ a Cedar Point hotel. It gets you into the park earlier and you can do the resort guest running of the bulls, which will help because lines for TTD are around 3 hrs. on weekends.
Now to TTD, it is currently closed, due to problems with the hydrolics (sp?). It should be open within the next week or two, obviously its top priority for the park.
Now for when to go. If you're going in the summer, go during the weekdays. Also, if possible, go in late august.
I know you didn't ask for advice on other parks, but I suggest you also go to Paramount Kings Island when you're in Ohio. Ride the Beast late @ night. That alone is worth the price of admission. The beast is undeniably one of the top 5 wooden roller coasters in the world. The park also has alot of other good rides. I suggest, if possible, you check it out.
If you have any questions, feel free to ask.