I don't think the area around this stage will be particularly big, as this is a small festival (no offence to the resident of this parish who is headlining it ). Apparently it is about doing the best they can with what they usually have. I am not going to question the wisdom or otherwise of that - for I do not have any experience in this area whatsoever. I would think for a group of 14yos, the experience of being on a small festival stage will probably be fun enough.
Anyway, thanks for everyones advice, opinions and knowledge etc. My colleague is happy enough with the situation now.