It worked out fine with lots of work on Friday night to get things stabilized, Tom subbed for me some of the time, the band tweaked stuff occasionally, and we were mostly on autopilot so I didn't have to miss much dancing.
We have an 10 channel mixing board (EV Entertainer), 2 main speakers, 2 monitor speakers, a huge box of cables and mikes, a variable speed CD player and a combination variable speed CD and tape player (which I had to lug back and forth between the dining hall and the dance hall several times).
We use 1 channel for the caller mike,1 each for the piano, guitar (played by the pianist), fiddle, mike for the mandolin, pickup box for the mandolin, etc. player, his feet. There are two special channels for the CD player. We had a spare channel that we didn't need.
There is also means to divert the signal from each channel to another output which can then be re-input into the system after being processed by an external processor. At the JP church we use this to feed the caller into another amplifier to feed a remote speaker that is at the bottom of the hall to make the caller easier to hear.
This entertainer is Tom Toomey performing as Eartha Kitt in the Variety Show.