I use a Canon scanner (Canoscan 4400F) that I love for this kind of work. It is a regular-size scanning bed, but as many photos as I can put down edge-to edge, I can use the "multi-crop" feature that is in the software that comes with it. It lets you outline as many of the individual photos as you want, and then when you tell it to scan, it works on each one and stacks them up in your processing software (I use Photoshop).
I had an HP before it was slow and not as responsive, often times crashing and not working until I restarted the computer. It may just have been that scanner, but once burned, etc. so I looked for something affordable and different. As you know, when a technology has been around for a while it gets less expensive, so this Canon cost just under $100 when my old HP cost probably between $150 and $200. I know that Rapaire bought the same model about a year ago, and though he was able to order it, I think they had discontinued this model.
Chances are good that the newer models of the Canon scanners work in a similar way and will have this software. The trick, with whatever scanner you use, is to use the "Professional" or "Advanced," whatever setting is there that lets you adjust and control the outcome. No point in scanning and letting the machine choose if you can do some tweaking and work on the color balance or reduce discoloration from time, etc.