Bidding isn't available for Jasper/Lake Louise or Banff. I would keep an eye on travelzoo.ca or Fairmonts Great Rates Great Dates or check Flyertalk.com Hotel Deals section to see if the Fairmont Friends and Family rate is extended to next summer. Unless there's a special event going on in Vancouver or Edmonton during your stay, I doubt you would have any problems bidding a couple weeks before you leave.