Hello Jennifer,
Welcome to the Disney Parks Moms Panel!
Disney Bus Transportation begins running from the Resort Hotels to the Theme Parks an hour before the Parks open. There is usually an early bus for those with early Advanced Dining Reservations. You will need to ask a Cast Member at the lobby concierge of your Resort Hotel about the early bus, and they will let you know the daily bus schedule.
Another option would be to take a cab or an Uber to the Theme Park. If you have an early Advanced Dining Reservation in Magic Kingdom Park, then I suggest taking a cab/Uber to
Disney's Contemporary Resort and then take the short walk over to the Park.
When arriving early, be sure to have your Advanced Dining Reservation confirmation number on hand to show the Cast Member at the
MagicBand touch point entrance to the Park.
Please stop back by if you have any additional vacation planning questions!
Magical Wishes,
Susan