I've dug out my (very) old scanner (A visioneer 4400, it seems) which it took me a while to sort out, but I found the original CD (me = digital packrat) and got it up and working.
I've done a couple at 600dpi full colour, which seems to give a decent result, output as .TIF files then opened them in Gimp to play around with the balance and settings. TIF files are huuuuuge though.
Some day someone is going to have to explain levels and thresholds in Gimp/photoshop.
Advice please - should I scan them in greyscale (given they're all black & white/sepia), or go for the full colour?