Since it sounds like you will be splitting up occasionally on this trip, I wouldn't rule out going to Rafiki's Planet Watch. My DS enjoyed the animals there, and it was a good break from the crowds. My DS also loved the Boneyard and the play structure that connected to it. Just a word of caution: it is easy to lose your child in the play structure, so be alert. Your father may enjoy the queues for EE or the Safari even if he doesn't want to ride the ride. We are also Flights of Wonder fans.