At the court house in Wilkes County, GA are some photograpths of meetings of Confederate Veterans about 1890 or so. Of the 100 or so gentlemen in the photograth are about 6 to 8 black men. They are in no special place and seemed to be just part of the group. All 100 men are dressed about the same.
There was a similar story at one of the G'burg reunions. Black Confederates showed up and surprised a number of folks; apparently they took their rightful seat among their brothers Union and Confederate for the event.