Hi Roger !
No I wasn't there at the Pori festival, though I've been in Turku on cruises several times. I live in Sweden at the opposite shore of the Baltic. I browsed the Crawfish King's photos a few days ago, and thought it ought to be some from your jam session.
I sounds as the Finnish festival managers did a bad job in making the festival program. An acoustic Cajun Band after a Rock n'Roll band !
I play accordion and guitar in the swedish Boiling Bayou Cajun Band. (http://boilingbayou.tripod.com).
Please drop me an email if you ever come to this part of the world again.