Volunteer organizations may assist public agencies, with the agency's approval, in the construction and maintenance of recreational trails in accordance with the guidelines issued by the board. In carrying out such volunteer activities the members of the organizations shall not be considered employees or agents of the public agency administering the trails, and such public agencies shall not be subject to any liability whatsoever arising out of volunteer activities. The liability of public agencies to members of such volunteer organizations shall be limited in the same manner as provided for in RCW
4.24.210.