This may a description of the camp, start with page 214 for starters

https://books.google.com/books?id=BBZCAAAAIAAJ&pg=PA216&lpg=PA216&dq=Civil+War+Camp+Harker&source=bl&ots=6qvnOH-AFl&sig=ACfU3U0KO5n_sz2u4a2G8mctRzEKiLfxtw&hl=en&sa=X&ved=2ahUKEwiqssGImursAhXLIzQIHW2uCZs4HhDoATACegQIAhAC#v=onepage&q=Civil%20War%20Camp%20Harker&f=false