I can speak to Moniteau County, but not the other two. At the beginning of the War, Moniteau County supplied more State Guard (Confederate) men than Home Guard (Union). As the war progressed and the EMM units formed, the scale tipped in favor of the Union. Based upon my research, the ration was 3 Union soldiers for every 1 Confederate from Moniteau, including EMM.

The attitudes after the War were mostly peaceful. The Missouri State Historical Society has digital versions of the Weekly California News through 1868, and some of the reports, ads, and stories will give you a sense of things. Moniteau experienced a mining boom following the War, so I reckon people were too busy working and rebuilding to grind axes. In fact, Confederate Brigadier General J.O. Shelby operated a coal mine in central Moniteau for a time after the War.

I have read the minutes from the area Lodges where Union and Confederate veterans attended meetings together. I have found no mention of the War or ill-feelings.

I would be happy to help you with any more questions about Moniteau County. Please feel free to email me at missourihunter@gmail.com. We also have a wonderful genealogy library and museum at our county historical society in California.