Park Tickets Question?

[IWISHFORDISNEY]

If I want to add waterpark tickets do I have to do that before I leave or can I do it when I check in? I was thinking of adding "waterpark and more option" to our ticket but didnt know.

 

[doconeill]

Not sure if you can do it at the resort, but you can do it at any ticket booth. You don't save anything doing it early, so if there is a possibility you may not need it, you might as well wait.