For "scanning" a multitude of negatives and prints, it goes considerably
faster using a digital slr and a bellows w/enlarging lens.
You can use a copy stand setup for the prints, and an old contact print
box for the negatives.
Here is an example of a 35mm negative copied with a Leica R digital back
and an enlarger lens.
http://www.tangobsas.com/phpAlbum/main.php?cmd=imageview&var1=Portraits%2F39_L1062521.jpg
This way one does not have to invest is a scanner for a single use
project, only a bellows and enlarging lens. In a pinch, you can use a
macro lens or a 35mm lens for copying the prints.