When you're a band who serves as its own troop of roadies, you have the pleasure of arriving at the event you're going to play before anybody else, and you get to leave after everybody else!
Most of the fun of setting up your own sound equipment is that you have to carefully, painstakingly scrutinize every audio nuance from various locations around the stage in relation to the speakers. Here we see JB and Joe listening (they do seem quite happy, don't they?), while Luanne wisely conserves her energy as she prepares to take most of the pictures you're about to look at.