Hi Lidier! Welcome to the Disney Parks Moms Panel!
I'm oh so excited that you're super excited about your upcoming Walt Disney World Resort Vacation! Breakfast at Chef Mickey's is THE perfect way to start your Disney day. Dining with your favorite pals, Mickey Waffles, and watching the monorail travel THROUGH the contemporary - talk about an essential Disney World experience!
I will say based on your reservation time you should take a cab. Definitely ask at your hotels Front Desk or Concierge Desk what time the earliest bus to Magic Kingdom Park leaves your hotel specifically on the day of your reservation, however it will be pretty early. There is a walkway between Magic Kingdom Park and Disney's Contemporary Resort, which is where Chef Mickey's is located, that if a bus would leave early enough would be a 15 minute bus ride + a 10 to 15 minute walk, depending on how fast you are before breakfast. And don't forget to add in the waiting for the bus.
Generally speaking,
Complimentary Resort Transportation starts 45 minutes to an hour before each parks opening time. Also keep in mind that resort buses travel in a "hub and spoke" system between hotels and the theme parks, water parks, and Disney Springs; they do not travel from Resort Hotel to Resort Hotel. So to get to a dining location inside a resort hotel from your resort hotel would mean waiting on a bus to take you to the park that is opening the earliest, then catching another bus (
or monorail, or boat launch) to get to your final destination. Personally I love sleep, and would rather pay for a Taxi if it meant 20 more minutes of shut eye.
I do hope this helped in your vacation planning, Lidier, and We'll See You Real Soon!
~Kristen