http://www.pc.gc.ca/eng/pn-np/ab/watert ... ctiv4.aspx "Reservations are available for wilderness campsites. A non-refundable reservation fee is charged, plus a modification fee for any additional changes to your itinerary. Reservations for backcountry trips may be made 90 days in advance beginning April 1 of each year. Call the visitor centre at (403) 859-5133."