Thanks guys!
We have a small mixer and a couple of small speakers we could use for monitors. And indeed we've been making that do.

The problem with it is this:
When you spread out 6 or 8 "jammers" across a "stage", each with their own mic/amp combo, it just doesn't work to only monitor "ourselves" and there's no provision for including all/any of the others "sources" into that mix.

Hence, the interest in the headset mic/monitor.
If we had that, we could easily set a volume to hear ourselves in the "mix" or "mix up" as it usually ends up.

We'll continue with the way we're doing things, and keep our eye on the evolution of the mic/monitor.
Thanks again for your comments!

LLOYD S