Do you replace the empty gravestones/urns

Yeah, I don't play much with ghosts but now I have changed my mind and embraced my Sims deaths (sort of, I still will release some of them) but as I do have a 2 or 4 gravestones/urns in my makeshift graveyard whose occupants have already been released and I want to put some of them into the new graveyard in Ravenloft (yes I know I can change it into a graveyard lot and I plan on) and I wondering if any of the gravestones in that graveyard has any ghosts attached to them? Because I don't see any names when I move the pointers over them but...I just want to make sure I don't delete any bodies gravestone.

I am also curious about the Crypt of Eternity and its ability to hold urns and gravestones but I just like to know if the inventory will hold? And is the inventory exclusively to one crypt or do all the crypts share the inventory like f.i. bookcases?

Btw, I really love the new expansion and although I won't be playing many ghosts I will definably keep some of them around.