Maybe - They could
As mentioned by PP, you have 2 other choices. You said you don't mind to pay to park
So you could pay to Valet park at the Contemporary - which is more expensive and you need to tip the Valet. But you would be right there. After breakfast walk to the MK and at the end of your day walk back to CR and retrieve your car.
Or you could pay to park at the TTC (if staying offsite) or park at the TTC for free (if staying on site) and Monorail to the Contemporary for breakfast, walk to MK after breakfast, and monorail back to TTC at the end of your day
Good Luck