astanley
En-Route
If they are important to you, I would make contact negs off of them on 4x5 sheet film. I haven't done any in over a decade so I don't know what the best materials/chemicals are right now but I could find out. Sad thing is that with the digital revolution, it's hard to find a good wet lab. I guess good digital scans would be ok, but I have yet to see any good archival digital mediums. Get your prints out of the albums they are in, and go to a good photographic supply shop and buy some albums labeled "Archival Acid Free" and don't use any glue.
You can do several things to them depending on what paper they were printed on to wash them and get the glue off (if you're considering this, while you're at the photo shop, get a bottle of "Photo Flo") and secure the silvers using things like selinium and/or refixing them. (most commercial lab machines do not properly fix and wash prints which is why they degrade over time.)
Contact conversion to neg is becoming a dark art... most of the time, with superb software and a great scan, you can do yourself a little better (than the contact conversion) and then re-print on papers like Museo Rag or Portfolio Rag for great hand and archival properties, using pigmet inks (e.g. LUCIA inks from Canon).
Photo-Flo is an absolute must. It's cheap and I always have a few bottles around; it's probably the best product out there for cleaning up and stripping unwanted gunk from pictures.
Dave, I'll drop you a PM, maybe I can take a look at a few for you.
Cheers,
-Andrew