If you live that close to a road that gets so much truck traffic, and you have small kids, wouldn't it behoove you to build a fence around your front yard?
If you have to bury your own, then how was the bully revived if no other family members were present?
Because Gus clearly belonged to... whatever it is that dwelled in the Cemetery.
It could just be a saying, and not an actual "rule".
So what happened to Ellie?
She grew up and died.
It's indicated in the book that she was well on her way to going completely insane.
Why does Rachel's father hate Louis? What was it about him that made undesirable to marry his daughter?
She was working to support Louis while he was in medical school (something many spouses of medical/law students do). Irwin didn't like that one bit and saw it as "turning her into a scullery maid."