I would think you are a little far east for pure rio's,not saying there aren't any around but might be hard to come by.
If you dont mind taking a ride I would find a Kansas public land map and take a drive toward Hutchinson,its not that far of a drive from you,dont hesitate to knock on some doors along the way,you would be surprised how many people will let you hunt there property.
Drive straight west of where you are then head north,would be my suggestion.
Good luck............Greg