"Is the main house open?"
Yes and No. The main house at Oakland Plantation has been restored and the family's original furnishings are on exhibit. The daily 1:00 PM tour includes a guided tour through the Oakland Main House.
The main house at Magnolia Plantation is privately owned and is not open to the public. The area outside the park boundary is private property and trespassing is not allowed.
It is important to understand that a plantation is much more than a main house, and the self-sustaining plantations of Oakland and Magnolia included pigeonniers, corn cribs, slave/tenant houses, cotton gins, blacksmith shops, etc. We encourage you to see and experience more than the main house during your visit.