Once my son & I were camping @ Lady Catherine SP in Arkansas. We'd been there a couple of days when in pulls a family with 5 kids from about 7 down to 1. "Well there goes the neighborhood" I thought privately.
In the next 3 days we were there, NOT ONCE did I hear a crying child, a tantrum, a squabble, yelling parents etc. I wish I knew what their secret was. My son 9 at the time was invited over for s'mores every night, & he went on several bike rides & hikes with that family. We even shared cooking a meal one night.
We still talk about that family. You just never know.