#540 Try 7 and a dog. Parents and us 5 kids and a dog. Mom held the youngest in her lap and us 4 stacking in the back with Pete the dachshund. Not cross country but a 270 mile moving trip. 1966.
Our parents compared to parents today were really amazing, AND they stayed together unlike the parents of today parents today really have it easy and they STILL can’t seem to stay together!!!