Cate:
I agree with you about the spontaneity of smaller cameras. I love my big cameras. I love everything about view cameras, but I can see the day coming when smaller will be the only way I'll able to get images 'away from the vehicle'. But, at least, today is not that day.
Re digitally-enlarged negatives: The mind boggles at some of the instructions on making the things. I'm fairly technically-minded but my eyes glaze and my head nods. I'm sure that for the person who does relate to that kind of workflow, some of the techniques are very good. They might save time and materials in the long run. Mostly, though, I think they appeal to the idea that art can be quantified. It might be part of the same notion that leads some people to study and emulate commercially successful photography, whether or not the 'look de jour' is something that resonates from their own gut.
My advice is still this: just go out and buy a pack of Pictorico OHP (or some other brand) and experiment with density, sharpening, curves, and 'burn' and 'dodge', in both the scanner and Photoshop. Print each attempt. The look of a digineg is a little different from a film neg. At least at the outset, you won't be able to judge how well it actually prints. Take really,
really good notes at every step. It wouldn't take you long to figure out the workflow that will make your art look like it 'came from Cate'.
The best to you,
d