We did the 1st and 2nd show before. Both times w/ multiple children. When we did the early it was a night that the MK was going to be open late enough that we could go there after dinner. The trip we did the 2nd show time, maybe 7:00 or 7:30 time, I can't remember, we were there when the parks closed earlier so we were able to stay until the end of the day at the MK and then go right over to Ft. Wilderness via boat.
Hope this helps.
Missy