DumboFan, You can contact Disney Photographic Services at (407)827-5099 for information on the packages they have available and to book a photo session.
I spoke with someone today about a family portrait. For the one hour session, the cost is $275 for up to 8 people in the photographs. This is the smallest package they have available. I keep seeing the price as being $250, so I'm not sure if they charge more if there are kids in the pictures, or if the price went up. I should have asked and forgot. My apologies!
You can take as many pictures as you'd like during the one hour session, usually about 20 - 30. You can choose to have the photo shoot at any of the resorts, Magic Kingdom, Animal Kingdom, or Epcot. (Just not MGM, though.) For the $275, you get to keep all your proofs (5x5 format), plus you get 2 - 12 pictures of their choice arranged in a custom presentation folio. They usually put the best pictures in the folio. Reprints can be ordered for $20 for a 5x7 or $30 for an 8x10. I'm sure they have other sizes as well, but I didn't ask about those.
They do offer a 10% annual passholder discount which comes off the $275 for the session, but no discount is offered on reprints. Hope that helps!
Now, I just have to decide where I want the pictures taken! I was originally thinking of MK, but since we're going right after Thanksgiving when all the Christmas decorations will be up, I'm thinking the Grand Floridian would have some great backdrops for family portraits!