Carnaval in Las Tablas, Panama, is a huge event. It brings around 100,000 visitors to the town -- and Las Tablas' normal population is only about 10,000. Merchants make a big chunk of their annual sales before, during and after Carnaval. Families earn some extra income by bunking in together and renting out houses or apartments to Carnaval-goers. Carnaval itself is a huge business, employing makers of costumes, floats and other paraphernalia at a cost well into the six figures. …