Cybersecurity Risk Foundation
That said, most of the resources, and membership, offered here are targeted towards leadership and or technical staff. With a membership, staff would have access to a wide variety of technical assessment tools and customizable resources, including policy templates, which might be of interest to trustees.
I suggest trustees make leadership aware of these resources, but don't insist on membership or adherence to all the resources. This site, and membership in the organization, is just one more option for your leadership and technical staff.