I went to Cedar Point last week for three days and the place was pretty busy. Millennium Force, Top Thrill, and Maverick were all about an hour long the whole trip. Mantis and Raptor were about 45 minutes and the rest were usually less than half an hour. Just plan your use of time properly and you'll be able to do everything you want. But don't feel like you need to rush and pack everything in because then it takes away from the experience.