Hi Kay!
Welcome to planDisney.
I love this plan! And yes, it's totally possible - let's talk it through.
You can make a dining reservation up to 60 days in advance. I recommend you reserve
The Crystal Palace at exactly 60 days ahead of time, because it's very popular. Breakfast there is so much fun with Winnie-the-Pooh and friends. It's such a joy to meet these characters - watch out for Tigger bouncing all over the place, and give Eeyore a hug if he needs it (clue: he always does!).
If you make your reservation for a time earlier than park opening, head to the entrance with a sign for "Guest with Early Reservations" and you'll be admitted into the park in good time for your breakfast reservation.
If you enter a park for any reason you will need a valid park admission ticket, and if you are going to visit more than one park in a day you will need a park hopper ticket. Tickets can be purchased at any Guest Relations window at all the Walt Disney World theme parks, both water parks (Disney's Typhoon Lagoon and Disney's Blizzard Beach - whichever is open) and at the Welcome Center at Disney Springs.
You can also purchase tickets online.
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 are always happy to help you plan your magical vacation to Walt Disney World!
Sue