As I've re-read this post of yours I find myself unclear about the procedure you suggest. When you talk about bracketing, I presume you mean three shots of each scene with different exposure settings. Of course I can achieve that by adjusting the shutter speed or the aperture; but then you talk about picking the film speed I like best for shadow detail. I'm not sure what you mean by "film speed". Are you talking about shutter speed? Or ISO? Sorry if I'm slow to catch on. You then go one to say I should "shoot an entire roll at that speed." So once again, by "at that speed" do you mean at a particular shutter speed, aperture. Or do you mean picking an exposure value or EV comp value such as "minus one stop", "plus one stop" or "normal exposure"?
Once again, sorry to trouble you with the elementary questions.