Dear Mr. Metrailer,
Thank you for posting your request on History Hub!
Besides the resources you listed already, we suggest that you add the Records of the Office of the Secretary of War (Record Group 107); the Records of the Adjutant General's Office, 1762 - 1917 (Record Group 407); Records of the U.S. Regular Army Mobile Units (Record Group 391); and the Records of the U.S. Continental Commands (Record Group 393) since the Army was often in charge of the removals plus the Office of Indian Affairs operated under the War Department until 1824.
For other sources, we suggest searching footnotes and bibliographies of books and monographs about the Cherokee Trail of Tears and Indian Removal, especially for NARA citations as well as records from other institutions.
We hope this is helpful. Best of luck with your research!
[Some information provided by Cody White, Subject Matter Expert]