My family is from Sharp County. Our family oral traditions (if they can be relied on) maintain that bushwhackers were active in the area for a year or so after the war. My grandfather told me some hair-raising stories that his father had told him about the depredations they committed. The sheriff deputized a number of men who tracked down and killed the bushwhackers. That, at least, is the tale that is told.
One of the customs I grew up with dictated that you always shouted from the road before coming on to a neighbor's property. According to my grandpa, this custom grew out of the bushwhacker days, when folks always kept a loaded rifle by the door.