We used gift cards to buy our tickets. We bought our tickets at the resort. We used 5 gift cards and it took forever. I don't think the lady that helped us had much experience with someone paying that way. It wasn't a problem, it just took longer swiping multiple cards instead of just one.
I had used my Target red card to buy the gift cards and we used them to buy our tickets and food. It was nice just grabbing a card or two when we left in the morning and not having to worry about keeping track of cash or debit/credit cards.