F.B.
A.-
You've gotten a lot of good advice on how to handle the bigger gatherings. I've got another suggestion, build intimacy by hosting, or by helping, or by meeting up with smaller segments of the family.
Make lemonade with your girls and go over to the aunt and uncle. Have the under threes and a cousin over for a run through your sprinklers with your kids. get your nails done with a cousin. bring over pizza, a bottle of wine and a fam friendly movie.
foster togetherness and commonalities.
My family can operate much like your husband's, a lot of people all gathered together, a lot of food and activity, but the conversation doesn't necessarily have much depth. It might not be what you would prefer, but it is OK.
Best,
F. B.