All of the drum brakes I have tuned are fantastic for a few hours of use, then only a notch above a scrub brake, until you fully disassemble and tune it again. I am in the Clutch Band Brake camp fully, with all gold-on-gold chain to boot. Unless there is room for a disc brake on the sprocket or rear axle somewhere, then have all three options. It can't hurt- rain, mud, salt and sand have some effect on braking systems.
Good luck, hope this helps, sometimes stopping can be a good thing,
SAT