Hi Stephanie! Welcome to the Disney Parks Moms Panel.
I am glad to hEAR you have a reservation for breakfast at
The Crystal Palace, one of my favorite restaurants at the Magic Kingdom Park. A perfect way to start a magical day!
Yes, you will be able to enter the park before park opening hour. When you arrive at the Magic Kingdom, there will be a well marked turnstile for guests with early morning reservations. Make sure you have your reservation number and valid park ticket with you.
I usually arrive 20 to 25 minutes before my reservation hour. I like to walk slower and stop to take pictures of empty Main Street U.S.A. and Cinderella Castle before I get to the restaurant. That moment when the park is almost empty is absolutely special and unforgettable!
Let us know if you have further questions. It is a pleasure to help.
Have a pixie-dusted day!
Gina V.