Nearly a year after a landmark deal to phase out most ranching in the Point Reyes National Seashore, the exodus of farmworkers and tenants from the peninsula is accelerating—and many still have nowhere to go. 

On Nov. 1, dairy workers will host a community dinner to raise money for the families who have lost—or soon will lose—their jobs and homes as most agriculture in the park comes to an end. 

Organized by the…