We just came back and at check in I paid the room in full with my gift cards. They would not apply anything more than a current balance so I would go every 3 days and apply what I had charged. If you reach $1500. they automatically charge to your cc on file so as long as you don't let the balance get that high you are safe. We used no cash on the trip and paid for everything with our magic bands - kttwc work the same. I ended up with $9.50 left over when I checked out