The Library has a trial of Southern Life and African American History, 1775-1915, Plantation Records, Part 2 that will run until November 20.
You can find a more detailed description of this collection at http://hv.proquest.com/historyvault/hv.jsp?pageid=browse&mid=14243#14243.
Access to Part 1 of the Plantation Records was acquired by the Library a few years ago.
Please send your feedback to dorner@berkeley.edu.