Thank you all for your help!

I've put together a quick Google map to visualize the movements of the unit. Here's a link to the map: https://www.google.com/maps/d/edit?mid=zrEZOTm43l-o.ktxq-Tlfp4zk&usp=sharing

And here's a link to the tabular list of locations so you can see them in chronological order: https://lh3.googleusercontent.com/-x11atl9aJ4A/VhKt29UKKcI/AAAAAAAAAR4/6RHAUUq8lfs/s144-Ic42/MapLocationTable_Oct5.jpg

Please let me know if you have more specific coordinates for any of the camp locations or any information on locations for the unit from May to July 1863 or September to October 1863 after the fall of Little Rock.

I did not mark Jenkin's Ferry on the map, as I don't think my ancestor ever made it back from Louisiana. His letter on March 26 mentions an injury sustained during the march down to Shreveport. He says he was too ill to walk at all around April 28. I think he fought at Mansfield, but I'm not certain.

Am I missing anything else?

Thanks again!
Jenny