It depends entirely on what you like doing. There are singers festivals, dancers festivals, audience festivals and musicians festivals.. each has a slightly different orientation. Each festival puts on a similar style programme, but the 'fringe' sessions are what can define the festival. Towersey is great for singers, but that isn't to say the music session in the pub is bad... it's just not as good as the music sessions in Chippenham.

For a comprehensive list of festivals,
courtesy of fRoots
should be useful.

For additional info, a search on 'folk festivals' in most search engines will give you other listings.

LTS