I think the CD of pictures from DC is worth it. My mom had my SLR on the beach with the zoom lens and because of where our encounter took place she wasn't able to get great pictures, if we had been located differently maybe, but since she wasn't able to take pictures we decided to buy the CD.
I think we ended up with a hundred or so pictures on our CD, and it included all of the ones from the dolphin swim as well as from other parts of the park. They do pose shots of your group with the dolphin and then pictures of you kissing the dolphins, and then they had pictures of you when you were out in the deep water with the dolphins and of the swim back in. They had also taken pictures in the aviary of us feeding the birds and the stingray lagoon doing a feeding, the park photography got some great shots while we were feeding the stringrays that are hilarious to look at and we never even would have seen them if we hadn't bought the CD. Wonderful memories that would not have been caught any other way.
I don't scrapbook, but my Mom does and she made me an awesome scrapbook of our day there, using mostly the pictures we bought as well as some that we took on our own.