Hello, Adena!
Congratulations on scoring a breakfast reservation at Be Our Guest Restaurant! This dining location is very popular, and the fact that you were able to secure a pre-park opening reservation could make this experience even more magical. Because you will be inside of the park before it is open to other guests, you will likely miss the
Magic Kingdom Welcome Show. While that may not seem ideal at first, let's consider a couple extra 'perks' that you will get from your early morning reservation: You will have the opportunity to stroll through a relatively empty Main Street, U.S.A. and take pictures before your breakfast reservation. After you have finished breakfast, you can try to be one of the first in line for Seven Dwarfs Mine Train, one of the park's newest crowd-favorite attractions. If you choose to keep your reservation at Be Our Guest, you will most likely have the opportunity to experience the Magic Kingdom Welcome Show on another day of your visit.
I hope you and your family have a wonderful Walt Disney World vacation, Adena! If you have any other questions about dining at Walt Disney World, please do not hesitate to stop back by the Moms Panel. Happy planning!