Still cleaning out boxes from my parents estate I found an envelope of negatives and 3x3 prints my father shot around 1965-1967 in Appalachacola FL. I have pencil drawings of the some of the image subjects so I am guessing he used them to gather ideas. I am thinking of enlarging these as a project.

The film is 120 and 127 B&W safety film.
Is there anything I need to be aware of regarding care of the negatives? I don't want them to go up in flames or melt under my antique enlarger.