From some reports I have seen that 1913 reunion was marred by renewed outbreaks of hostilities. Not just between former belligerents, but also some bad blood between Confederate units - "Well, we reached the wall, at least!" "Yeah, and you did it because WE took most of the fire!"
Also, touching moments. If I recall correctly, a Confederate who was wounded at Devils Den, and was helped by a federal, heard a federal recounting the incident to some others, they compared what they remembered of it and, it would seem, they had met that day, the federal helping the wounded Confederate.
I've seen some recently (past 10 years) estimates that there were upwards of 850,000 military deaths as a result of the Civil War. Something that is deucedly hard to track down is the civilian deaths. I read one report from the Surgeon Generals office in the 1890s that there were around 1,250,000 "excess deaths" in the civilian population during the War. If so, that means close to 2,000,000 deaths from that war. Plus the injured and maimed. Figure that, with the war being mostly in the South, and the, for want of a better phrase, planned famine that resulted from federal actions, maybe 1,000,000 of those were in the South. At least. Deaths from starvation, malnutrition, and diseases resulting from or complicated by those.