I just spoke to the phone info operator for the PPH.
"We advise all our guests that if they intend to enjoy the evenings festivities inside the park, that once they get inside the park, to stay inside the park."
No preference is given to hotel guests, handstamps, or anyone else. When they close the gates, the gates are closed!
I intend to arrive at 8 AM, and stay through the night. They'll have to drag me out!