Hopefully that will work for you. I will say we’ve never had an issue paying with GCs at the beginning of our trip, even after checking in online. If there was a charge/hold prior to that it eventually got cleared out and I know my end of trip credit card bill was exactly right.Cards are already maxed at 1k each except for 1- but it's for when we are there and am still sniffing out gc discounts to put on it before we go. Will give this a try and report back how it goes in case anyone else here doesn't want to wait on hold for 1 or 2 or 3 hours just to make a payment.
I think the main thing with GCs is to be careful with charging back to your room, as they will bill your credit card every day for any charges incurred, so you need to make sure you close out your bill at the front desk on a nightly basis if you want to pay with GC. Don’t pay with your magic band and it’s not really an issue.