Would it be possible to get the contact information for the volunteer organizer in order to inquire about volunteer opportunities on the grounds? Thank you very much.

If you contact the San Francisco Parks Trust, which is located at McLaren Lodge in Golden Gate Park, they can assist you in volunteering at the park. They organize and help others organize clean up days, gardening projects, and other volunteer opportunities. Their contact information is 501 Stanyan St; (415) 750-5105.