When shooting with film to transfer to digital (in normal daylight) would it be recommended to shoot with a fine grain film? On my scans, I'm still showing a little too much emulsion for my taste. I'm currently using Kodak Professional 400 speed.
I find it difficult to believe you ask this question. You know that lower speed film has a finer grain by your own admission, and that it produces images with less visible grain. Yet you ask if shooting a finer grain film will produce a less grainy scan?
The best philosophy is always to use the slowest film you need, in any photography. I am sure it could be done, but if you want to upload to this site, you are making it difficult to get your images accepted.
In the Texas sun I would try to use 100 ISO film most of the time and 200 when necessary