Going on the Celebration with my family and my Sons Girlfriend and her Dad. Her Dad is booked under an offer where he gets the Cheers Package, but just for him - not both of them. She wants to add this on for her. She called Carnival and 2 people told her she could add in advance but then when they transferred her to the 3rd person, she was told it had to be added on the ship.
Just confirming that this is still the case and there is no way to add it on before the cruise (thus paying the cheaper price).