In some festival situations, depending on the festival and who is running it, even below the musicians are the sound techs. Some festival organizers are wonderful people. And some really, really are not.   I had a pretty unpleasant experience with the head guy at a festival where I was volunteering as a sound tech. He treated the musicians and the paid participants very well, but everyone else was pond scum to him. I had a lot of good experiences with some of the other people at that festival, but I would never ever volunteer for a festival that is being run by that particular individual again.