Since I've just joined not long ago and can't make the Sat meetings I'm not sure what you've tried. Some suggestions to increase participation:
1.Each member donate equipment, fish, shrimp, substrate,etc. from which to do a random drawing each month. I understand that you do swap plants at each meeting. If yall are like me you have a fish box with stuff that you don't use, extra light, filter, etc. If you raise shrimp that could be a donation....
2. Bring a cd with pxs of your tanks. We'd have a time where we show the each person's tank, issues etc.
ALSO: I would be glad to host a meeting at my place. It can be any other time but Friday night sundown to Sat night sundown.