Thanks for so many quick replies. Currently I'm using my wee motor-driven Contax rangefinder for this, in 35mm -- handheld. So my goal is to keep the image at my eye, rather than keeping it in my head while I lower the camera to flip switches or wind and so forth. These are all fine suggestions! My goal is to extend the tonal range of my pix, though they're already printing very nicely as 20x30's

(And yes, I have completely staved-off my many well-meaning friends who have suggested building shots like this in Photoshop from digital snaps. This is one of those cases where I firmly believe in a direct, unadorned print from the negative the intent and motion is there at the moment, not later on in an armchair at my desk)