God you're not kidding! My boyfriend, who's a music photographer, was shooting the group and had a very nice photo of me leaning my head against my accordion. It's a great photo. But I explained to him that was me trying to hear my own accordion!Your biggest problem will be hearing yourself playing .
Everyone will be turning up their amplification to the max in order to hear themselves so whether you're even amplified or not may become moot?
Your best bet may simply be a good set of earphones connected to your internal microphones , so you can hear yourself play ?.
This is a somewhat casual group of mostly acoustic (but amplified) musicians. They play for fun, but they are all extremely good musicians who aren't competing for attention. I sure hope you're wrong about being amplified though!
That's an interesting thought about having earphones for the setup.