I love my wifes family reunions, too. She is one of 11 kids. Her mom has 36 grandkids. We own a 40x100 party tent, and Everybody pitches in. The kids make a killing returning the empty cans the next day.
Next year, 5 of Nana's grandkids all graduate highschool. They are known collectively as the 89'ers (all born in '89). We have already started planning a central graduation party for them.
I have two brothers and between the three of us - my parents have exactly ZERO grandkids, two grand dogs and three grand cats.
We don't need a tent.
I've got 56 cousins on my mom's side. I'm not sure I even know them all.