Pirates booked their place in the next stage of the African competition after beating Uganda Revenue Authority 4-3 on aggregate.
The Buccaneers remain the only team from South Africa still playing on the continent after both Kaizer Chiefs and Mamelodi Sundowns were booted out of the CAF Champions League in the first round.
READ: Bacela: Bucs keep flying the flag
Bucs communications manager Mickey Modisane tells snl24.com/kickoff that goalkeeper Brighton Mhlongo is amongst the travelling party to Libreville.
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"Both Erasmus and Matlaba having been nursing injuries. However, good news is that Brighton Mhlongo has fully recovered from his injury and is travelling to Gabon," Modisane confirms.
Kick-off on Sunday is at 16h30 (SA time).