To see their work, you have to click on Wishes Weddings and then wait for an image to come up with the name of the photographer you want. Then you click the black bar at the bottom of the pic and it takes you to his/her portfolio.
Disney has been offering to send its photographer even if you hire an outside photographer, but I don't know of many professional photographers who will allow you to have someone else shooting when they're there. Talk about too many cooks in the kitchen...