When you book a cruise with
DVC points the DVC agent will give you a cruise confirmation #. This number can be used to look and update your cruise reservation on DisneyCruise.com. EVERYTHING is the same, you can make all shore excurtions, dining reservations (PALO), update documents all online using your Disney log in and your cruise confirmation # / birthdate. I have booked several cruises using points and have done some with cash. There is NO difference in what you are able to look at online, and what travel forms you receive.
Have fun cruising!!!!