Hi Dyana,
Here is another idea to consider in the case the MK has a 9:00 opening time on your Chef Mickey's, 7:10, breakfast day. How about if you park at the TTC early, walk over to the Poly, and then take a cab to the Contemporary? It shouldn't cost much to take a cab from the Poly to the Contemporary. (I am guessing $10.00 at the most, with tip.) Having your car at the TTC before your breakfast and before park opening will save you park time later because you no longer have to move your car after breakfast. The small cab fare will be buying you extra park time. The bonus is that you can really relax and enjoy your special breakfast, then casually walk over to the MK, and easily make rope drop knowing your car is all set for the day!
I hope the MK has morning EMH this day so you don't have to worry about any of this. If not; you have some good choices from which to make your plan. Have a magical vacation!