I always save every family and lot to the library bins using 'household with family', 'household only' and then I evict the family and save the lot to bin. I do this routinely in case of glitches with either the lot or family.
I am wondering about the Goth family. I have the 'household with house' saved. So I can load that without repercussions.
But if I save just the lot and/or just the family, will the ghosts remain intact with the house. Also if I placed the house on a lot and then the family separately into the house, would the family ties be broken.