Disney Goer! Park Reservations are REQUIRED In order to get Into any of the theme parks. This Is not your theme park ticket that you purchased. This Is a reservation system Disney uses to manage occupancy. If you do not have a park reservation, you will not be permitted Into the theme park. Even with a theme park admission ticket. Reservations have been known to ‘sell out’ so make your park reservations as soon as you get your tickets linked. They can always be cancelled and made again If you have changes.