I concur. My wife is originally from Ringsted and I've hunted extensively around there with my brother-in-law, especially east of town. Another area (public) is Swan Lake (north of Ingham and High). You may also want to try the west fork of the Des Moines in the Graettinger area. Shot a big 9-pointer (one broken brow tine) near there in 1998.
Stop by any of the local elevators (Bancroft, Lone Rock, etc.) and get acquainted with the guys there. Many of them hunt or know the guys that do.