Thanks everyone for the suggestions.? You've given me a lot to ponder. We currently have 2 Yahoo groups setup..one that for newsletters and announcements that only the Moderator can post, and one for discussions.? Of the 500 or so members in our club, less than half are in the discussion group, and almost all are in the announcements group.? And there is yet a 3rd Yahoo groups reserved for the board of directors (15 members).? My hope is to consolidate all three into one groups.io group, so it seems like John Russel's approach is best--?
1.? Setup the Main group for announcements and newsletters and configure it so that only the moderator can post to it.
2.? Setup a General Discussion group as a subgroup of the Main group and let members subscribe to that as they wish
3.? Setup a Board of Directors group with membership limited to the Board
4.? Encourage people to use hashtags to follow specific threads so they don't get overloaded in the general discussion group and setup a small number of very focused subgroups (like Buy-Sell-Trade) that members can self-subscribe.