We love getting an 8am ADR inside the park before rope drop at 9am. First it saves you one trip driving or taking the bus since you're already at the park eating. You get to take some pictures of the castle, Mickey's hat, etc with minimal crowds in the background. It's a fun way to start the day eating bfast with characters.
However, you are not free to roam the park before 9am rope drop. At CP, they'll hold you right at the end of main street until rope drop.