For the eight dairy workers and their families honored at a benefit dinner on Saturday night, the applause was bittersweet. Together, the men have spent 141 years living and toiling on the dairy farms of the Point Reyes National Seashore, rising in the dark, milking cows twice a day, raising their children in humble ranch houses and trailers. Yet as every dairy and nearly every ranch in the park shuts down in the wake of…