Bishop's Castle Folk Weekend was a 'Fringe with the main event'. We did it for 5 years. The first one packed the pubs but the 5th one (this year's in fact) altho covering it's costs only attracted Mudcatters and folkies but none of the local folkies or general public. There are loads of rules and regs i.e. Health and Safety for campsite and venues (yes even your own risk assessments for the pubs) but it isn't that difficult. First aid, insurance, Fire extinguishers, Fire lanes.... Arrrrrgh!!!

Don't think that just because the pubs have covered that side of things that the PRS won't chase you, cos they will. BIG TIME. They pester week in and week out after the event. Believe me, they'll suggest that you write down every song sung, tune played, author, length....

Good luck
Sal