Hello Samantha,
Thanks for stopping by the Disney Parks Moms Panel with your question! Enjoying breakfast in the parks before they officially open is one of my favorite things to do during family trips to Walt Disney World! There's nothing quite like walking right down the middle of Main Street, U.S.A. and having it almost all to yourself. It's also a practically perfect time to get some great photos!
No need to worry about making it to Magic Kingdom in time for your 8:15 a.m. breakfast reservation. Disney's complimentary bus transportation is still an option. Although bus service to the theme parks begins one hour before opening time, there are also "breakfast buses" that run even earlier specifically for Guests with early morning dining reservations. When you check in to
Disney's All-Star Movies Resort, I'd just ask what time those will start running on the morning of your reservation and the exact pick-up location. I'd recommend giving yourself at least an hour for travel time.
Another option, if you don't mind paying a little bit out-of-pocket (rarely more than about $20), is to take a cab directly there. It would definitely be a quicker route and might give you a few extra minutes of sleep in the morning.
Wishing you a wonderful day at Magic Kingdom, Samantha! If we can help answer any other questions as you put the final touches of pixie dust on your plans, please let us know.
Beth