As the pp said, you can get the DDP later but it's not as easy as just adding it to your existing reservation. Since you booked RO, that will have to be cancelled/refunded and a ticketless package booked, requiring a new deposit. Since RO and packages are different reservation systems, money paid toward one cannot be applied to the other. Keep in mind that the new reservation will follow the package rules, requiring the balance to be paid 30 days prior to arrival. Also, if the room type you have booked is no longer available with the AP discount, guest services will probably have to make the change in order for you to keep the discount as CRO doesn't usually have the ability to do that since the room would be lost once cancelled.
Our Authorized Disney Vacation Planners are here to provide personalized, expert advice, answer every question, and uncover the best discounts.
Let Dreams Unlimited Travel take care of all the details, so you can sit back, relax, and enjoy a stress-free vacation.