Planning a return trip to my favorite beach in the world, I was almost as apprehensive as I was excited. The last time I visited Troncones — a town of some 600 people pushed up against the Sierra Madre del Sur mountains on the Pacific coast of Mexico — was five years earlier. At the time, we’d been living in San Miguel de Allende, and we occasionally drove down with our two sons and two dogs. My husband — an avowed “non-beach guy” — and I had come to love this village of farmers and fishermen for its rawness, its drowsy authenticity.