Looks like we'll be in Canmore during the folk festival this summer. Will tickets sell out (i.e. do we need to buy in advance or can we buy at the door)? We'd probably be attending Saturday night. Also it looks like from pictures that people bring their own chairs to sit on. Is this the case or is seating available at the festival? Not too crazy about sitting on the ground. Are there often street entertainers around during the festival so as to hear some music without actually attending the festival? Thanks for any info; I like to know in advance what to expect.