No kidding...we had plenty of time to learn the board and see how a 2-channel PA (I had been using a Peavey Mark VIII bass amp as a PA amp) with monitor Aux's work and can he mixed to our liking. My oldest boy would stand along the back wall of the room and give me hand signals, so we could tweak the sound for the other acts.
This entire episode aligns with our motto in our house: If you're going to screw-up (and you will), fail with integrity and learn from your mistakes, and somehow make it fun. To translate, Don't be the biggest asshole in the cluster.
We did OK, have a great story to tell and learned a ton...and the meatballs were delicious.