If someone has not flown from YEG they should not answer the question. I will respect my own comment as I have not flown since the new section opened but note in the link below that you now leave your checked bags at check in!
http://www.flyeia.com/expansion2012.aspx
Also, Westjet leaves at 9 am. I would not suggest arriving 2.5 hours early as you WILL then get the tail end of the rush time. Arrive 90-120 minutes before departure and you will be fine.