Sorry I didn't see this one earlier but yes, I am from the area! Sioux Center, IA actually. about an hour SE of Sioux Falls. But during the summer I get up that way at least every weekend.
But, I see you are a CMA member. That is cool I ride with the NW Iowa Chapter out of Sheldon, IA when I can. I am not a member yet, I don't get much of a chance to ride with them. Are you with the chapter out of Sioux Falls?