Every family will have a different way of doing this & the key is to find the way that best suits YOUR family!!
We really enjoy the DDP for different reasons but one of the things we like is that when we spend a day in the park, it is typically from early in the morning until we eat dinner. At that point, we are hot, tired & NEEDING the break!! Usually we schedule later meals (my kids are a little older), maybe 7:30ish, take our time & by the time we are done, we might see the fireworks & call it a night. Our meal typically signals the end of that day for us.
I don't know we'ld like it as much with earlier meals....full stomachs on rides just don't do it for us!!
But, we really like the DDP & can't imagine NOT doing it!