In the past, I have always made my resort reservations directly through Disney. This time, I booked a room only reservation for Feb 2018 through a travel agent, as I got a better deal this way. I have some Disney gift cards that I'd like to use toward the outstanding balance. Can I call Disney and make payments toward the balance myself, or does this have to be done by the travel agent, as I didn't book directly? Since balance om a room only reservation is due at check in, could I just make payment in person at check in with the gift cards? Or will they have already charged balance to the credit card I have on file?