The Calgary Sports Car Club is the 'go to' club for rally in the area, and has meetings on the first Thursday of every month. see http:///www.cscc.ab.ca for details. Their rally forum on their 'message board' is a great resource for event information.
The next stage rally event coming up is the Big White Winter Rally, based at the ski hill just east of Kelowna. There are a LOT of Calgary teams headed that way, so you might be able to get involved there. (Almost always looking for volunteers)