Adding to post by Ruth Archer, one she missed (I'm sure accidentally) is the chantey, "Pay Me My Money Down." It works well as a chantey, and also was collected from ex-stevedores.
Chorus and first two verses:

Pay me, Oh pay me
-Pay me my money down
Pay me or go to jail
-Pay me my money down.

Oh pay me, Oh pay me
-Pay me my money down
Pay me or go to jail
-Pay me my money down.

Think I heard my captain say
-Pay me my money down
T'morrow is my sailin' day
-Pay me my money down.

No. 50, With musical score, pp. 208-209, 1992 reprint of 1942 original, Univ. Georgia Press.

St. Simons Island and coastal vicinity long had a mixture of free and slave. Some slave-owners contracted with ship owners to provide labor aboard their ships; both slave and free were seamen on some vessels.
I would guess that the songs collected from the ex-stevedores are mostly post-slavery.