I would go with Wapiti out of canmore:
http://wapitisports.com/guided-fishing/
They will provide you everything you need: fly or gear
At that time of year, runoff might be started, which would make fishing the bow pretty tough if this is the case.
Another option, is that they could also take you up to spray lakes for some early season lakers. Depending on when ice is off, laker fishing can be pretty good in tight to shore at this time of year.