Found these links after a google search. Neither of the sites are governmental sites so you may want to do more research.
Hopefully some Diser's will chime in with their experiences.
http://www.orlandoinfo.com/articles/information-for-visitors-with-mobility-disabilities.cfm Transportation & Parking
Whether you are driving your own car to Orlando or renting one upon arrival, be sure to bring your out-of-state or foreign disabled parking permit. Prominently display it in the windshield of your car when you are parked in designated public handicapped parking spots. Temporary permits are not available.
Special parking by permit is set aside at every establishment. Even out-of-state vehicles displaying disability parking permits issued by another state are allowed to park in spaces designated for persons with disabilities.
We just used our Handicap Parking pass from here with no problem.
From the parking handicap parking areas, there are complimentary wheelchairs to get your person to the gates. The only place we do NOT park at the handicap parking is at Magic Kingdom. From the MK Handicap parking area, there is a big dip then a climb that DH's knee finds too hard to do. So, when we get to MK regular parking, we just ask the attendant to park close to the tram (DH waves the Blue Handicap pass at them and asks nicely and they always let us park at the end of the isle. At all the other parks, we park in Handicap and if he needs it, we take a complementary wheelchair to the gate where he rents his EVC...
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