Glad yo enjoyed Copper Kettle Aeola as I am now half of that duo and have been for the last eighteen months. we had a great time as always at Otley.
Unfortunatey there have been a number of venues lost which makes the session side harder to encourage yet few of those walking round looking for sessions took the opportunity of starting one that I am aware of . In the past when faced with lack of sessions I have and word soon gets round if it is worth joining in.
I've also noticed this percieved lack of sessions at other festivals this year, very often the fringe of a festival can be the making of a festival and organisers ignore them at their peril