1. Don't forget to bring those headphones into the park with you.
My DD is 4-yrs and is by no means sensitive to sounds and I've found that she NEEDS the headphones for Fantasmic. WOC and the Fireworks shows. The show sounds are just so loud for her little ears. I think it will help your little one.
2. I assume you're flying Alaska Air from Canada - they still offer family pre-boarding so make sure you take advantage of that so you are in seats either near the front for faster exit or near the restroom.
3. If your daughter does get plugged up ears, ask the flight attendant for 2 styrofoam cups a few napkins and hot water. You put the napkins in the hot water then into the cups and hold them over your daughters ears and "pop" them with the steam. Sounds weird but it works, I've done it a few times on my little one.
4. Have her favorite blankie to being on the plane in case she wants to sleep (and planes get cold) and she will have it at the hotel.
5. The Anna & Elsa boutique makeover is going to add a lot of sparkle and hairspray to her hair. If you want it to last until the next day for the parks. have her sleep with a towel over the pillow so there is less chance of glitter sticking to her face. To refresh her style the next day have a spray bottle of water and spray and restyle the hair. This is important, Dad!
6. We bring only one or 2 favorite toys and I buy cheap ones at the dollar store to bring because things get lost!
Enjoy your Daddy and Daughter trip!! I bet anything you do will be amazing to her. Just make sure she gets rest and stays on her sleep schedule. I remember taking trips just with my Dad when I was little and they always made me feel like he CHOSE to spend time with me and I remember feeling so special