HarperWI... to answer your question when we did the breakfast last year, they actually have a seperate rope leading to the dinosaur ride area, so you can stand there and wait until 9AM, when official opening time then there is a guide that leads you to the dinosaur ride and you can be one of the first to ride the ride. I'm going back in Jan, and we made breakfast reservations purely because I want to be waiting for dinosaur when it opens. If you are the first family waiting for the ride to open the guide makes a big deal and you get to do something, I just can't remember what that something is.
A word of advice, I thought I would be smart and take our rental car and that plan failed because they let the buses in early but the cars they do not let in to at least 8AM, which made it hard for us to be on time to our 8AM reservation. We were late, which didnt matter because I made everyone shove their food down their throghts so we could get to the park opening at 9AM. I would rather have taken the bus and been able to enjoy my breakfast. In Jan we will be taking the bus! I learned my lesson.