I have never been to SD but I have heard a lot of people talk about it. Since no one has said anythign to you yet then I will just chime in for you. Its SD so there are numerous birds everywhere but from what I have read on the internet, I would say that the Southeast Corner of SD is about the best spot. Like I said you are goign to find birds about anywhere they take over 2 million birds a year and my state of Illinois takes 200,000. I hope I was some help and have fun.