The guides will take a lot of pictures of you and your family with their camera (some of which you don't even know they are taking); they will also take plenty of photos with your camera(s) at designated photo spots.
At the end of the adventure they give you a card which has a code that you can use to pull up all of the pictures they took with their cameras. The code is good for 90 days. I pulled all the pictures I wanted from their file and saved it to my iPhoto. I believe there were over 1,400 pictures from our trip that they took posted (this included all the families on our trip -- not just of us!).
Have a great time! This trip is on our "list"; please post pictures and / or a report when you return.