We came home with lots of leftovers, and I wish we'd thought to bring our own containers! Would have made the post-meal divisions much easer. However, we also did Thanksgiving potluck style, and MIL lives alone and clearly didn't want to keep all the leftovers. She would have been eating the same food for a week straight, at least, plus she's vegetarian and GF and couldn't eat everything we brought. Better if everyone gets a day or two of leftovers. We arrived with the bird* and dessert, and left with the carcass and a bit of everything else.
I can't imagine someone who arrived with empty hands demanding leftovers, much less someone who didn't arrive at all! How incredibly selfish and entitled.
*The breast meat came out a bit dry, thanks to having to travel and reheat, but in our family the leftover white meat traditionally goes in the soup made from the carcass, so it'll be rehydrated in its final form.