Marco B's example doesn't look at all like the 30's photos, but it is an outstanding example of good technique. (You feel you are there.) Overexposure by one stop is a frequent method to make sure you get adequate shadow detail and sufficiently open shadows with little (but not zero) chance of screwing up the highlights. Bracketing is certainly a well proven technique in uncertain exposure situations. Increasing the exposure while decreasing the development works for certain situations, but it takes some knowledge and experience to make it work consistently. That doesn't mean you shouldn't try. Sheet film makes experimentation like this more economical and easier.
