We visited this cemetery as part of a walking tour. We enjoyed seeing an authentic New Orleans cemetery, like what you often see in the movies. Our guide said this was the cemetery used in the movie Double Jeopardy.
It's located in the garden district, which is a great place to visit anyway -- great restaurants and gorgeous old homes.
Close to the cemetery is a bookstore and cafe with tasty treats.
The cemetery is often closed on Sundays, though not always. To play it safe, go M - Saturday.