Please be aware, that this is a cemetery and as such should be treated with the respect that you would provide any Cemetery. Yes, There are many famous and infamous people buried here. Marie Laveau The Voodoo queen being the most famous occupant, along with Homer Plessy, of the Plessy v. Ferguson Supreme Court decision on civil rights.
However, Finding a good tour group is the recommended way to go! Why? because this cemetery is next to the projects in NO. You don't want to go down there and get lost, or find that you've ended up in a place that isn't safe!