For the past few years on the last weekend in September, Lebanon has hosted Lincoln's Lebanon. This Civil War reenactment features a Lincoln actor and includes speeches, singing and a skirmish complete with cannon fire. The encampment includes surgeons, weavers, tanners, blacksmiths and even a chaplain. Everyone is very friendly and willing to talk about the historical research they have done.
Link to more info: http://www.in.gov/visitindiana/tripplanner/EventDetails.aspx?id=13918