As previously stated, I'm going Sat & Sun, May 5th-6th with my niece and nephew for the first time. I'm planning on buying the SoCal 2-Day, 1-Park Per Day $99 Promotional Ticket... Disneyland on Sat and DCA on Sunday. However, I was wondering, if we decided Sunday we wanted to go back into Disneyland after seeing everything in DCA, can we upgrade to the 2-Day Park Hopper $114 Promotional Ticket by paying the extra $15 at the ticket booth or do u need to make the decision before you buy the ticket.

Experienced visitors, I appreciate all your trip advice. Thank you!