You can add tickets and dining and keep the discount on the room portion

. However, you wouldn't be "adding" tickets and dining per say as you would technically be making a new reservation as a package. Since money cannot be transferred between room only ressies and packages, the room only ressie would be cancelled/refunded and a package booked, requiring a new $200 deposit (unless you make this change less than 45 days prior to arrival, in which case it would have to be paid in full at the time of booking). If you do decide to change to a package, keep in mind that dining must be added at least 3 days prior to arrival

.