I agree with Jack Campin - apart from the undrinkable beer! I go mainly for sessions but also would like interesting instrumental workshops and concerts, an informal dance e.g. Cajun or Bop till you Drop, and it's absolutely essential that the festival is in a town or village rather than greenfield as I have no car so camping is very difficult - carrying the camping gear and instruments is bad enough but I don't want to be leaving instruments unattended in a tent or carrying them round all weekend.