Found film, lost images

Do you know these people?

I've been gifted a considerable amount of old 35mm film over the last few years. I took a few rolls out hiking at Starved Rock last week. I developed this roll of Polaroid 35mm HD film on Friday. I shot this roll with my vintage Helios lens - most of these would have been freelensed flowers and greenery. When I pulled this film out of the developing tank, imagine my surprise at seeing all these PEOPLE!!!

I don't know who gifted me this film, or if it was from one of the lots of expired film I've purchased. I'd love to find the people in these photos - they look like they were having lot of fun!

PLEASE - share if you see this!!! Let's find who shot this roll of film before I did!