Here is some advice regarding parking from allearsnet.com, hope it helps!
Self parking at the Disney resorts is free to all guests; however some resorts have parking restrictions. The Contemporary, the Polynesian and the Beach Club give guests not staying at those resorts a 3-hour parking pass to allow shopping or dining at these resorts. Parking at any of the resorts to gain access to the theme parks is not allowed. Disney resorts may ask for a photo ID before allowing entry. Some Disney resorts may also ask for an Advance Dining Reservation number from guests who are dining at the resort before allowing access to the resort parking lot.