A current Topo map with battlefield core area marked from NPS
On document page 80 https://www.nps.gov/abpp/CWSII/MissouriBattlefieldProfiles/Lexington%20I%20to%20New%20Madrid%20Island%20No%2010.pdf
The area matches the location of Blue Mills Ferry on the 1877 atlas of Jackson Co. Pay attention to old river channel.
John R