Hi Larry,
Glad you stopped by today at the
Disney Parks Moms Panel. Still some time to go until your vacation, but in no time, you will be enjoying Spring at Walt Disney World Resort.
Staying at a Disney Resort hotel has its many benefits, including access to
Extra Magic Hours, where one of the Theme Parks will open one hour earlier or close two hours later. This gives Resort Hotel Guests more time to experience their favorite attractions.
In order for your niece to enter a Theme Park early or stay late during these exclusive times, she would need to be registered under your room reservation. Since she is only coming for one day, you could ask the front desk to add her as a "Day Guest" to your reservation, provided that you do not exceed the maximum occupancy for your room. She should then be able to add the room reservation to her
My Disney Experience account and be able to have fun with you.
One last tip: remember to make
advanced dining reservations 180 days before your Check-In. I am sure your niece would love to enjoy a delicious meal with you. Happy planning!
Ricardo.