Hi Erica,
Welcome to the Disney Parks Moms Panel and Thank you for sending us your question. Whenever my family and I visit Walt Disney World Resort, we always enjoy breakfast at
Be Our Guest Restaurant, it is fantastic!
Transportation officially begins 45 minutes prior to Theme Park opening, however whenever we have had early morning breakfast reservations, there has always been a bus available to take us wherever we needed to go. Early in the morning, there will be a Cast Member at the bus stops and they will assist you in arriving at your destination.
Personally, I like to leave plenty of time to arrive at my destination without having to worry about being late or missing it all together. I would recommend leaving around an hour and a half to an hour and fifteen minutes before your reservation in order to arrive on time. Depending on the bus us schedule it may take some time to get to Magic Kingdom Park. It also will take time to get into the Theme Park as well as walk to Be Our Guest Restaurant.
I hope you have a magical time at Walt Disney World Resort, Erica. Please let us know if you have any other questions, we are always happy to help.
Stephanie