Doyle, I note that the Louisiana Archives holds many Confederate pension records of CSN personnel, and at least one of these sailors was noted to have served on the CSS PONTCHARTRAIN. However, I doubt very much if the pension papers would contain any further data on the movements of this vessel, and would probably just mention the sailor's service on the vessel and nothing more.
However, I am certain that in the future, more data on the vessel's activities in that region will be located, but where are these items held at?