Welcome to planDisney, Nidelis! It sounds like you've got a great holiday weekend planned in a couple of weeks. The Fourth of July at Walt Disney World Resort is a great time to visit because there is a fun, celebratory energy in the air! While we don't know exactly what special surprises are in store for this year, I recommend making sure you have
Disney Park Pass reservations for
Magic Kingdom Park on the third or the fourth so you can catch the special
holiday fireworks!
Nidelis, if you made a room-only reservation, meaning that you booked a room at a
Disney Resorts Collection hotel and did not bundle tickets with that booking at the same time, then
your balance is due when you check-in. You don't have to worry about paying it off before you arrive, it's all taken care of for you on your arrival date! In my experience with booking a room-only reservation, the balance of the hotel reservation is usually charged at the same time as all of the purchases that have been charged to your room, so very early in the morning of your check-out day. This is subject to change though, so check with the front desk when you arrive for the most up-to-date information!
Have a magical day, Nidelis!
Jessica