Superbrad's suggestion is good in Ontario, but without many streams in southern Sask you'll be looking for roosting and watering sloughs (or rivers) and feeding fields.
If hunting typical flights that are resting on sloughs and going out to feed in the fields, watch the flocks going out to feed in the very early morning. If they are flying more than a mile between roost and feeding field you may have a pass shoot. Even better if you can scout the birds a couple days before. You need to be a half mile or so between roost and feeding field so as not to disturb flocks on either side with your shots. Hide on the flight corridor, which will be busy a half hour before sunrise to about a half hour after, and again from about 8:30 or 9:00 to ten or so as they come back to water after feeding. Try to learn to estimate range. It is far too tempting for most folks to sky bust birds at 70-90 yds of range when those within 50 yds are the only shots to take. Pass shooting is unlike decoy shooting, and a long range gun and load is in order. It is pretty much 12 ga, 3" territory. ( or even 3.5" but I've personally never used the ultra mag loads) Pattern your gun with steel shot sizes 2 to BB and figure out what load it likes and and with what choke. If you can afford tungsten iron shot, ( Hevishot) shoot that, it is FAR more effective for long range pass shooting. Bismuth is back on the market, it is pretty good too.
You will shoot behind most birds until you perfect your swing, it is absolutely critical to keep swinging when long range pass shooting, whether swing thru method or sustained lead. I prefer swing thru. "Butt belly beak bang". With lots of air in front of beak.
Forget about using your third shot. If you haven't brought one down with your first two, your third is a crippler, not a game bagger.
You don't need camo. Wear drab coloured clothes ( not too dark) and DON'T MOVE when birds approach and only look up if you are wearing a face mask. If shot birds might land in water don't shoot unless you have chest waders or a dog along. If dead birds land in tall cover mark the fall and look for them immediately, you will lose them unless you have a very good dog.
Have fun!