Ahoy there, Michele! Bringing in the New Year on the
Disney Wish sounds like a great way to celebrate to me! I know having your son with you will make it all the more special.
The answer to your question is not straightforward, unfortunately. I suggest you work with the entity that you originally booked your existing reservation, whether it was
directly with Disney Cruise Line, a travel agent, or another source (like the Disney VacationClub). You will need to work with them to look into adding an additional stateroom and move one of your Guests. Also, if your reservation has any restrictions, they will be able to look those up and review them with you. Being able to add your son also depends on whether the ship has reached capacity or not.
Michele, I hope this helps you on your way to hopefully having your son join you on
Disney Cruise Line. If you have any other questions, sail back to
planDisney for help.
Adventure is out there!
JoVonn