Peter Laban: I think you should recognise that at music festivals, the vast majority have come to hear, or play music. I don't recall anybody planning to go to a folk festival in order to look at a photographer's back. It may be that you do your photographing with great discretion, if so, good on you. Unfortunately, this is not alway the case with your colleagues, and this needs to be considered.
You say, for example, that as microphones get in the way, you "have to" move around to get good shots. Would it also be your position that audiences "have to" move around if photograpers get in the way?