They are 1, 2 & 5!... it’s going to be a busy trip!@FCDub is right.
I would park at the MK general parking lot, take the tram to the TTC and walk over to the Polynesian. Depending on the ages of the grandchildren and worried about walking from the TTC, then I would pay for valet at the Polynesian instead.
Then I would probably buy for the valet parking at the PolynesianThey are 1, 2 & 5!... it’s going to be a busy trip!