I gave couples 1 box. I gave singles 1 box. And then each child received 1 box.
For the couples, I doubled up on things like edibles and our water bottles. They got 1 of everything else.
For singles, they received 1 of everything.
For the children (we had 3) I made them their own boxes since they got things the adults did not (like plush and light-up spinner toys).