As best I know, the footnotes for the AofT order of battle which mention Clanton are unique. Clanton expected to receive command of the Alabama cavalry brigade under Wheeler, but remained a general officer in command of a small regiment during his brief time with the army.
To make your point, Colvin's 6th Alabama Cavalry included a number of officers who had seen hard service with the 1st Alabama Cavalry, but the men had little combat experience prior to July 14th. Livingston's 8th Alabama Cavalry (eight companies) had no prior experience.
Evans has compiled a complete history of Rousseau's raid, and I miss his account as much as anything else. If I recall, Clanton came into contact with Rousseau without engaging him on July 18th. Clanton's presence and the possibility of Confederate reinforcements from Montgomery arriving at the station prompted Rousseau to continue eastward.