Thanks!
Currently, I'm using a macro lens, lightbox, and random stuff to act as flags to keep stray light from entering. It's doable but not great. I have a film holder also, but it doesn't really do that great a job keeping the film flat. And the setup is just fidgety, I don't want to put too much money into it though if I think I'm going to get a scanner.
I bought a Plustek for 35mm. It's really slow compared to SLR but does have the benefit of being a little less fussy.