I seem to remember someone had the good idea to hold a forum during Sidmouth folk week, probably the biggest meeting of Club organisers in the country.
Fitting it in to the programme makes it an official event with the publicity, insurance stewarding etc that goes with it. Therefore it should be priced as any other workshop. I see no problem with this. Perhaps one outcome of this first meeting will be a timetable of future forums which could be costed accordingly, perhaps even free.
It would be good if there was a meet scheduled in at every festival.