If it's a pick and pay you're after, there's also this place in Okotoks (assuming the river didn't wash them out) -
http://www.saskatoonfarm.com/
EDIT: A quick google brought up this page as the first link -
http://www.ab-conservation.com/go/de...-within-reach/ (A list of places at the bottom of the page. If you go to their frontpage, and select conservation sites, you can filter it to show berry picking with maps)