Hi there, Grant!
I am so happy to hear that you are ready to book your magical trip!
You are correct that you will need to provide the name and age of every person staying in the room with you. But, you can easily modify this through your
My Disney Experience account. All you will need to do is to log in, go to "My Plans" and click the blue "Change Reservation" button next to your resort reservation.
Now, I do want to offer you one word of warning. Make sure that the person who you select to fill the spot is the same age as the person who you will eventually travel with. This ensures that you do not end up with an adult who has a children's ticket. While most issues could be fixed by a friendly Cast Member
over the phone, it could affect the price of your package.
You will also want to make your modifications more than 30-days out to avoid any change fees.
I hope that this answered your question, Grant.
See you real soon!
Sarah B.