Hello Christyn, and welcome to the Disney Parks Moms Panel with your interesting question.
I understand and empathize with your situation, being a mom of a special needs child myself. Rest assured that from the beginning of your Walt Disney World Resort experience right to the very end, Disney Cast Members (attendants) are always present, helpful, and friendly. In fact, I feel spoiled by them and let-down upon our return home back to reality. Cast Members have consistently anticipated our needs on every visit.
The parking lots at all Walt Disney World Resort theme parks are well managed with Cast Members facilitating drivers to available spots. Guests have frequent, open air, secure tram shuttles from each parking section to the Ticket and Transportation Center (your gateway to Magic Kingdom Park) and back at the end of the day.
If you decide to park your own car, it’s handy to take a picture of your parking section name, for easy retrieval at the end of your visit.
Guest Drop Off/Pick Up is available and located near the taxi stand at the Ticket and Transportation Center where you can either ride the Monorail or Ferryboat to Magic Kingdom Park. When approaching the parking booth, simply request the Guest Drop Off/Pick Up area and you will be directed accordingly. You and your daughter can be dropped off and wait in shady, comfortable areas while the car is being parked.
Disney's Disability Access Service is extremely helpful for my son in making his visit to Walt Disney World Resort positive, welcoming and inclusive.
Christyn, I hope you find this information helpful for your upcoming visit. It would be our pleasure to assist you with any other planning questions in the near future.
Wishing you a positively, magical day!
~Jacqueline