You need to enter the first park first…There are a couple of misconceptions with Park Hopping that I’d like to clear up. As you already know, you need to have a Disney Park Pass Reservation to enter any of the four Walt Disney World theme parks. What happens if Magic Kingdom is full, but you can get a reservation for Epcot? You need to enter Epcot first, you cannot go directly to Magic Kingdom. You can’t Park Hop unless you’ve entered the park that you have the reservation for.