Twelve ranchers involved in nine ranches resigned from the Point Reyes Seashore Ranchers Association on July 26, saying a recent letter sent to the park service that requested consideration of the use of soon-to-be vacant Drakes Bay Oyster Company’s buildings lacked proper input from membership. That letter, drafted by a subcommittee and copied to numerous elected officials, asked the park to freeze plans to demolish the buildings until an environmental assessment for the new Ranch…