How about a simple sign on the door saying please end all sessions by......! I was there on Saturday evening briefly and I couldn't tell that there was anything going on in there until I opened the door. It is completely unecessary for jumped up power junkies to interrupt sessions - they do have the option to turn down folk festivals if they don't like folk music!

There are plenty of burly blokes that steward who I'm sure would be only too happy to protect the festival after all, they steward so that they can attend and wouldn't want trouble at any festival.

George