Hi!
Disney does do family portraits at the parks. I had a session with them back in 2003. We met the photographer when the park opened in front of the castle. He took pictures of us in front of the castle, and around the park. He speant 1.5 hours with us, and we got around 40 pics. They also picked out 8 of the best shots and put them in a nice portfolio with the WDW emblem on the front. You do get a 4x6 'proof' of each shot, but there is nothing on the pictures designating this, so you can just use them as your pics. The price was $298.00 for this. We have a honeymoon portrait session booked for this December!
Go to their website at
http://www.collages.net/disneyweddings
Make the user name blank, and type in 1971 for the password. You then have to enter in your email, but then you are on their sample website. They have samples posted for weddings, bridal session, family portraits, and honeymoons. You can call Disney Photography at 407-827-1578 or Disney Event Group at 330-755-2335.
Hope this helps!