The resort parking areas are for guest of that resort. They are not large enough, nor are they designed for theme park parking. Imagine how frustrating it is to be paying Deluxe Resort rates and to come "home" and be unable to park your car at your own resort, because the parking lot is filled with theme park people.
They can park at the TTC and take the ferry or monorail to the MK and meet you there. They can park at each of the other parks lots and meet you at the main entrance to that park.
Good Luck