Tech workers have often been the bad guys of San Francisco: Their mass influx drove up rents, and residents worried about how they were changing the character of the city. But when COVID hit, these same Silicon Valley citizens embarked on a privileged exodus from California’s cities to its mountains and lakes. Rachel Levin, a journalist who lives in San Fran, saw her city transform as the tech base left and started to wonder: Where exactly were all these people going? She found that many ended up a few hours away, in Lake Tahoe, a gorgeous area that attracts lots of tourists, even during a...