Hi there Carrie,
While I think this is more of a "Disney Cruise Line thing", it never hurts to ask. While I can't guarantee that the Cast Members of Caribbean Beach will be able to help, I can guarantee that you won't go home without autographs.
Characters appear in each and every theme park and they're easy to track down each day with the help of a handy dandy Times Guide which will be available near each parks entrance turnstiles! One of my most cherished Disney souvenirs is a photo mat that I was able to have signed by my favorite characters a few years ago and locating each one and obtaining those priceless signatures was like a fun quest that I'll never forget.
Another easy way to obtain several signatures at once is to book a
Character Dining Experience! The characters will come around to your table to sign your album and pose for pictures! This is a great way to enjoy a yummy meal while knocking out several autographs in one sitting!
You will be able to carry the album in with you if you have a stroller or backpack, or you can even remove a few pages each day (if it's a binder style) to eliminate the need to lug around the bulky book. Be sure to bring along a nice Sharpie marker! In my opinion, these produce the best autographs!
Best Wishes,
Amanda F.