black baseball hat, turn the hat around, let the wires run down the inside of your shirt in the back (make sure its a little longer than normal), tuck the md, cables, bat box in your back pocket of your jeans. you can clip the mics to the front of the hat, the bill of the cap will cover the mic cables till they get in your shirt.
the only thing people will see will be two little things popping off the front of the hat. if they give you any weird looks, just act like you don't want to be there, and look sternly at the band. everyone will leave you alone.
ed