Ahoy Scott!
Thanks so much for visiting the Disney Parks Moms Panel with your question! Unfortunately, there are no discounts for booking a Disney Cruise at the Disney Parks and really no place to book your cruise. Your best bet is to book online on the
Disney Cruise website or with a Authorized Disney Vacation Planner. You will want to check out the
Special Offers Section and know that rates are sometimes a bit lower in September, October, November (except for Thanksgiving week) and in January. Also, usually the further out your book, the lower the rates.
When you do set sail on your magical voyage, you can get a good deal on a future cruise by booking onboard. Onboard promotions for future sailings may include a 10% cruise discount, reduced deposit, and a shipboard credit for your next cruise. Even if you don't know when you will cruise next, you can book a "dummy date" which you can move at a later date to the cruise of your choice.
Please let me know if I can answer any additional questions, Scott.
Have a magical day and good luck with your cruise plans!
Nancy