I asked a coworker who lived in Pointe a la Hache until just before Katrina. He said he had been to the cemetery, way back in the woods, but that it hasn't been operational for a very long time. Before Katrina there were about a dozen headstones still there. Because other area cemeteries were severely damaged by the storm, he said he doubts Bohemia survived.
I did some searching online. A 2007 Environmental Site Assessment done by the Army Corps of Engineers mentions the cemetery. Later in the report it mentions there are 2 headstones there and there are plans to relocate them. See actual page 19, or page 24 of 43, Section 7.1 "Interview with Site Owner" for reference to the cemetery and the relocation.
Here's the link to that report:http://tinyurl.com/3kqovnj