There are four of us, and by nature we have two early birds - DH and DD9, a night owl - DS11, and me. I kind of fall into both - a bit of an early bird and a night owl if circumstances demand it, but I do tend to be a bit of a mid-day slumper.
We tend to tour with early mornings, mid-day breaks, and returning to the park in the evenings. So far we haven't done really late nights with the kids, but hoping to push it a little more this year. Last year we had a night we're we split up the "girls" and the "boys", and the kids loved it, so maybe I'll do the night owl thing with my son one night this trip - as long as there's a little flexibility the next morning because waking him up can be rough!