That's not true! We have told them we were just visiting the resort or were coming to eat quick service (yes we really were doing these things at various resorts) and had no problem. You do not have to havea table service reservation or be a resort guess to park. We have done this at Contemporary, Poly, Wilderness, Grand Floridian etc. BUT WE NEVER DID IT TO JUST STAY PARKED THERE. WE
ALWAYS MOVED AND WENT TO TTC ETC IF WE WERE GOING BACK TO THE PARKS ETC. Just be courteous to others and do not break the rules. Use there parking only for valid reasons.