I have a multiple day camping trip planned with my fifth grader and 40+ others, and was considering renting a DSLR to document the whole thing, maybe make a little keepsake book from it. But the best price I saw today to rent a Nikon D50 was $60/day. It wouldn’t take too many days renting before buying makes sense. I’m really looking forward to doing this but not too thrilled about messing with film and scanning it all when I get back. I’ll take a lot of pictures or very few (and miss out), depending on how well-equipped I am.
A little more research is in order, it seems.

Have you considered renting a small bunch of “single use” digital cameras? I’m thinking along the lines of how people put single use cameras on all the tables at wedding receptions, nowadays.
you can’t rent those: you can buy them. If I had ever reliably gotten the hack to re-use them working, I would get some of those and pass them out. Alas, one more half-assed project.