Use a digital camera.

Use a photo-editor to crop mal-adjustment.,,,wobble
Determine the histogram - all should be consistant....consider "American Memory" broadcasts.

Process through historgram profile...to correct change in color values... Most MAC 10+ include this.

LABEL - the jpg!!! Date, numerical, and subject.

Record an audio explanation of the photos - by the superior - or whomever a living source is.

The intensity of an "old school" scanner might age a photo 50 years....and at 35 years you might be viewing color change in the originals.

Consult the Library of Congress - for archive advise.

LOC will take submissions if you meet their guidelines...