Groups are definitely the way to go. I'm not familiar with Google's security roles, but is there a Viewer/Read-Only option that everyone in 90Minds could have? And then the committee members could have full-access?
We also may want a 'staging' area outside the Library drive that normal users could have write-access (to their own items, only) as a place to put things and notify the committee to update the library.
------------------------------
Steve Iwanowski, NextStep Technology Advisors, aka DSD Lancaster PA ¯\_(ツ)_/¯
------------------------------