Hi Dean!
Welcome to planDisney.
Congratulations on securing a dining reservation at one of the most popular locations at Walt Disney World -
Cinderella's Royal Table! Located inside Cinderella Castle at Magic Kingdom Park, it doesn't get more magical than that!
For any dining within a Disney theme park, you will need park admission tickets, even if you are only visiting for dining. As your reservation is for earlier than the official park opening time, you will see an entry point for guests with dining reservations, so you can enter the park before it opens. You will be admitted in plenty of time for your 8.20 am reservation, and I suggest you arrive at the gate around 30 minutes prior to that.
If you are using Disney transport, this will start operating around 45 minutes before park opening (for the date of your reservation, Magic Kingdom Park opens at 8.30am for Early Entry for Disney Resort hotel guests, so transport begins at around 7.15am). I would ensure to be at the bus stop by 7.00am so you can board one of the first buses, arriving at Magic Kingdom Park in plenty of time for your breakfast.
There's something very special about being in the park before opening time. Remember to take some photos on Main Street U.S.A., and in front of the Castle before the park gets busy. I think the Magic Kingdom is at its most beautiful first thing in the morning, while it's just waking up for the day, and you can enjoy the atmosphere as you make your way to the Castle.
Please come back and visit us again if you have any further questions, and you can
send me a direct question if you wish. We will be happy to help you plan your magical vacation to Walt Disney World.
Sue