No, you have to park in the parking lot for the park. Sometimes they don't give the 3 hour passes, but they do it often enough that's it's not really worth taking the risk.
Personally, I never drive my car once I'm onsite (we drive down, so we always have it), but if I were you, I would definitely take the resort transportation on your MK days. The TTC is such a hastle since you have to stand in line for the tram and then for either the ferry or the monorail.