Hi Meghan!
Welcome to the Disney Parks Moms Panel.
There is something very magical about enjoying a theme park before everyone else arrives, and one of the easiest ways to do this is by making an early breakfast reservation at one of the theme park restaurants - just like you have done! Even though your reservation is slightly after park opening, I would suggest you arrive no later than 8.30am, and after you have been through a security check, make your way to scan your MagicBand or park ticket at the entrance that has a sign for Guests with an early dining reservation. You may have to wait a few minutes before they admit you into the park, but you will not have to queue with the regular park guests, and you will arrive at your reservation with plenty of time to spare.
Many of the restaurants in the Magic Kingdom Park open up their breakfast reservations as early as 8.00am, and this is exactly the same procedure for those early guests.
Magic Kingdom Park is really lovely first thing in the morning, and I love to soak up the atmosphere and enjoy the park while it is still quiet. Taking photos is a joy when no-one else inadvertently walks into the picture!
Enjoy your breakfast and your special first moments in the park.
Please come back and visit us if you have any further questions. We will be happy to help you plan your Walt Disney World vacation.
~ Sue