What happens to the graves...
 

if you evict a family from a lot with people graves and pet graves?

My experience is that they stay with the lot. Urns are too but I've managed to lose those on occasion.

What drives me nuts is the only way I have found to restore a smashed urn (usually thanks to a teenager I wasn't watching) back to a whole urn is to bring the sim back to like and let them die again.

Well, my lot is corrupt -- crashed every time I tried to load the occupied lot, now it hang when I try to load the empty lot in Lot mode -- so I'll probably have to bulldoze it.

The people who hang out at Simbology and I have decided that the best thing to do is bring Wilfred back to life on the new lot and let him die of old age again. Hopefully, there will be a new toddler to cuddle him!