Some of these may pre date the war as well. Some of the sites that they came from probably saw use prior to the start of the Civil War. It seems like once a good site for a camp was found it got used multiple times through the years. I have found Colonial era items and even Indian relics in CW camp sites.
D, very nice collection you have there of the pipe bowls and stems. I too have never found either. Hopefully I'll come across one some day. Thanks for sharing.