I thought I would close 2017 by updating this thread with the fact that I have continued to use latex tubes without incident. The most significant change to my setup was that I replaced the plastic rim tape on my wheels with cloth tape. Also, between rides I maintain a reasonable amount of pressure in the tires. Without the latter, I believe that the pressure in the tire(s) could get so low that the mere weight of the bicycle could flex the sidewall enough to separate the bead from the rim. When that goes undetected, the next time the tire is inflated the tube could get trapped between the tire and the rim.
And, yes, I always use talc when mounting latex tubes.