I thought OP was very eloquent in her explanation, but this:
Some said my son WANTS to go deer hunting, it is not a NEED. Well, those of you that are not familiar with deer hunting don't know anything about it. The deer anyone in my family gets, gets eaten at the dinner table all winter long. If my son, or either of his two older children, get a deer when he is home for his visit Thanksgiving weekend it will be given to the older two children's family, my DS's ex-wife. His ex-wife has 5 children to feed, so any deer that is gotten will be welcomed. So, no, it is not a WANT to go hunting...except for in the way of WANTING to put food on the table.
Maybe it's because my family doesn't hunt but are you telling me that this is the only way this family will eat? So if they don't catch anything than this family will starve? How about he goes to the grocery store and buys them food. I think this is crazy that you're trying to justify this little hunting trip as if it's the only way these people will eat.

And maybe if her daughter doesn't go to work, she could lose her job and then not be able to feed her own family.
And what's wrong with taking the kids to a park, bowling, movies... something all 3 can do? Or why do they have to anything, other than spend time at OP's house watching movies, playing games or actually spending quality time together, talking and catching up?