A buddy and I started to dabble in waterfowl hunting a couple years ago as something to do before the big game hunting season starts. We've been using the 'Alberta Discovery Guide App' to look for different ACA/Ducks Unlimited Sites. That is a good place to start if you're like us and not interested in driving around asking for landowner permission.
http://www.albertadiscoverguide.com/iPhoneApp.cfm
There are a handful of good sites within an hour of Calgary and they are usually good for a morning or after work hunt. During the early season especially we always see lots of ducks and occasionally some geese coming in to the different sites we've hunted at.
Using the Ihunter app we also found a handful of grazing leases north of Calgary that we were able to hunt ducks on as well.
Best of luck.