Like llama, our kids are now 23-30 y/o. It’s been awhile.
One thing I see all the time are parents pushing the envelope. Remember, your daughters schedule RULES!!! If she is cranky find a place for her to rest. There are places throughout the parks where you 3 can find a seat or a quiet place and let her nap. Or if she is on a good schedule plan your park hours around her. If you are staying onsite it is really easy to go back to the resort mid day, take a break, and then head out again.
Remember, you’re all on vacation. Make her first on memorable. Don’t rush like crazy people and enjoy each others time away from the home routine.
Oh, and with a young one, check out the kid swap procedures that many of the rides follow if you both want to ride something. One stays with your DD and then gets on when the first rider has finished.