Right next to my "Mudcat Discussion Forum" bookmark is my "Canadian Folk Festivals" bookmark, at: http://www.interlog.com/~ufojoe/ , with "information on over fifty Canadian Folk Festivals".[and they also link back to DT from their home page].
I've been to festivals in Ottawa, Kingston, Toronto, Barrie, Picton, Owen Sound, Winnipeg, and out in Nova Scotia. They all have their own unique characters, but I have never been disappointed!