Just general timing questions

I just bought tickets to Cedar Point today, me and a friend were planning on going up on the 4th of July, because his family used to go in the 90s when the park was much emptier on the 4th of July. However, I guess due to Economic Conditions and what not, the last 2 years have been very busy 4th of July's.
This year the holiday falls on a Sunday, which is listed as the least crowded day, but it's open until 1AM, and longer operating hours usually mean more crowds. We could in theory go up any day between July 2nd and July 16th, which among these would allow us to ride the most rides if we showed up when the park opens, and left when it closed?

It is probably going to have a pretty nice crowd but people are going to celebrate July 4 on Monday because that is when it is considered a federal holiday. It is totally worth it though to go when its open until Midnight or 1 AM. The park is gonna have fireworks and the families and teens move out after them. Also, any sunday (this one and memorial/labor day) are dead. Tuesdays and Wednesdays are pretty good also.

I disagree.. I have a good feeling the park is going to be rather crowded this Sunday, as many people will use Monday as a day to travel back home. You're right about a lot of people leaving after the fireworks, however.

What time are the fireworks, generally?

10 PM

I was at the park yesterday, and during the downtime on Mantis, the ride operators were bantering to see if anyone could guess the number of parking spaces on the peninsula. This led to one of them mentioning that all employees were under orders not to bring a car anywhere on the peninsula on the 4th, and that they were going to to be bussed in, so that every single parking space would be available for guests.

They didn't say how often this sort of order went out, but from the way they were talking about, it didn't seem like it was a common practice, and it stands to reason that tremendous crowds are expected for the 4th, at least by the estimation of management.

What would be the best choice between Tomorrow, The 4th, Next Sunday or any of the days inbetween

Parking Bans for employees are standard practice on the 4th of July. Even if the park (rides) aren't that busy, a tremendous amount of people come into the park for the Fireworks.