Welcome aboard, Cheryl! A Land and Sea vacation with Disney is the best type of vacation around! First you'll have four fabulous days and nights of fun at the parks and then you'll be setting sail on a relaxing cruise where you can recover from the fun you had at Walt Disney World, or keep the activities going and participate in many of the exciting events at sea!
Unfortunately the Disney Parks Photopass system is separate than the photography services on Disney Cruise Line, so you will not be able to use your PhotoPass + on the ships.
Your Key to the World Card will serve as your photo card on the ship, and the photographer will scan it each time they take your picture. This will assign all of the photos to your stateroom account. Then, you can stop by
Shutters, the photography shop, onboard each day to view prints and digital images. Guests can purchase individual photos or entire cd packages with various amounts of digital images on them.
I hope that helps as you plan, Cheryl! I do love the Photopass + in the parks, though. It's so nice to have those attraction photos right on the pass alongside your other pictures! You might consider the Disney Cruise Line photo cd to save all of your cruise shots too!
Have fun as you continue to plan, and please let me know if I can help with anything else before you set sail!