Here is the luggage link again: http://cruisevacationhub.vancouver.bc.ca/cruise-ship/storing-luggage-in-vancouver-635054.html
Link to Canada Place, referenced in the article above: http://www.britishcolumbia.com/information/cruiseships.html
I can't get the first link to work, but I found this info...
Baggage Storage Services Baggage storage services are provided at Canada Place by CDS Baggage. Tel: 604.303.4500 I would NOT recommend going back and forth to the airport to store bags, IF your touring is downtown (you wouldnt be touring by the airport ). It is at least a 30 min. cab ride and $25++ each way. Very costly in time and money for a day visit.
Is this the info you found?