If I go on a photo trip I number each roll, for example H1, H2, H3, H4, H5 etc for all rolls shot with the Hasselblad. P1, P2, and so on for pinhole. L1, L2, L3 for the Leica.
Then I carry a note book and write down the pertinent info like lighting conditions. Works for me! I like the idea of taking a picture of a note with 'place, time, people's names, etc)