The Baptist Church has different branches with varying philosophies. A thorough look at this church would take more space than I have allotted here, but the following resources are just some of the websites that may help you in your search for ancestors who were members of the Baptist church.
At Baptist Church History and Genealogy, http://homepages.rootsweb.ancestry.com/~baptist/, you can find websites having to do with Baptists as well links to online databases. By clicking on the Collections and Depositories link, you can peruse libraries and other archives that house manuscript collections having to do with the Baptist church.
Baptist Studies Online at http://baptiststudiesonline.com/ is the website of the Southeastern Baptist Theological Seminary. According to their website, Baptist Studies Online is dedicated to the study of Baptist history and thought…Currently there are 2 volumes, 2007 and 2008 of the Journal online at http://baptiststudiesonline.com/the-journal/. Under the link Primary Sources, there are a few additional links for historical articles involving Baptists and various topics. The link Baptist Studies Online, http://baptiststudiesonline.com/links/, provides links to archives, libraries and historical societies that can assist in your search for manuscript collections, records and documents.
Ancestry has the database, South Carolina Baptist Marriages and Deaths, 1835-65,
http://www.ancestry.com/search/db.aspx?dbid=3414. The Family History Library has quite a few Baptist church records. To find them, go to the Family History Library (www.familysearch.org), click on ‘Library’, then on ‘Library Catalog’. Then do a subject search for ‘Baptist’.