I would like to echo the thoughts of others that staying one night at Royal Pacific and adding a day is a better plan. But, if you can’t, here are some thoughts.
General Touring:
Travel light. Many rides have mandatory lockers for your belongings and some roller coasters do not allow you to have anything in your pockets. Lockers are free for the expected duration of your ride experience. General lockers are available at the front of the park. It does not take very long to secure your belongings in the locker but it sure will take a while if you are turned away at the ride and have to do it after being in a line.
Get there well before park opening. In October, the parks are not open very late. To accomplish a lot, you need to take advantage of the lighter crowds in the morning.
If you are more concerned with getting to ride than riding all together, use the singles line whenever possible. It can be faster than Express in some cases.
Tentative Plan:
(feel free to give feedback)
Start with IOA about 45 min to 1 hour prior to park opening. Proceed directly to Hogsmeade (easiest through Suess Landing. Now, this is going to seem silly but you will want to ride the Hogwarts Express both ways, so that is your first ride…right to Diagon Alley.
Then, ride Gringotts
Transformers
Mummy
Simpsons ( I love this ride but it is a simulator and can cause motion sickness)
Men in Black (nearby)
Check out rides toward the front of the park next…Minions and Rip Ride Rocket
Head back to Diagon Alley for food and exploration. See Olivanders here. There are three rooms as opposed to one and lines move more quickly.
Ride the Hogwarts Express back to IOA.
Save Forbidden Journey for a little later and head to Marvel Super Hero Island. Ride Hulk (if not being refurbed).
Ride Spiderman
Head back toward Hogsmeade but check out Poseidon’s Fury on the way.
Ride Dragon Challenge
Ride Forbidden journey
Flight of the Hippogriff doesn’t have very good capacity but if the wait time is short, go ahead and ride. It’s basically a “kiddie coaster”.
Head toward Jurassic Park and ride the River Adventure.
Now, I have left out the two drenching water rides because I don’t like touring the parks soaking wet but if it is warm enough and you are ready to leave anyway, you could ride these last. I also left out all rides at Suess Landing. They are geared toward a younger crowd but the area is stunning and great for photo ops. Cat in the Hat and E.T. are also sort of fun. I am also a big fan of Terminator 4D but it is a time sucker. I have not included any of the shows or themed areas or kiddie play areas. You only have a day if you choose to go that route. I really, really, recommend two days with park to park and an overnight at Royal Pacific. With the ages of your children, this would be so much better.
Eat dinner at City Walk. The park likely closes around 7PM. Margaritaville is fun. For money saving there is a “fast food” food court on level two with plenty of seating. Check out the dining “sticky” for more information.