Duck and Geese Guide up North recommendation

I have read several threads on here about shooting some GREEN. I have never had the chance to shoot a mallard yet and that is my plan this year. From what I can gather you need to book early and hunt as far north as you can?? So I am wondering if anyone has any good recommendations for South Dakota and or Canada area?? I know PTO in Kansas is recommended many times. I also know they book very quickly. I have an email into them as well. Just looking for alternatives and I know some of you have good recommendations for other outfits. I want to get started on this early so I don't miss out again this year!! Thanks