Well, I finally found my solution. OP, I don't know if you have already gone on your trip or not, but if not, maybe this will help you. I ordered a Baggallini Bryant Pouch. It is AMAZING! It is only 6.5” tall, 4.75” wide, and 1.25” deep. Even though it is tiny, it holds a lot! I have been able to fit my phone, my lip gloss, hand sanitizer wipes, floss, a poncho, mints, a pill box, a key, my driver's license, my health insurance card, a Disney GC, my DVC card, a Landry's card, and there's still some room left over! It works as a crossbody, a wristlet, or a fanny pack. I bought it thinking I would use it as a crossbody, but I think I like it as a fanny pack better. It's very light even with all those things in it since it weighs only 5 ounces empty. I am going to try to avoid bag check by sticking it in my back pocket with my phone in the other pocket. Then as soon as I enter the park, I will clip the Baggallini onto my hip and stick my phone in the front pouch. Totally hands-free! (I ordered it through Baggallini on sale and with an additional 20% off, but it's also available from
Amazon.)
https://www.amazon.com/dp/B015GJ1XIW/ref=twister_B07MW1BV94?_encoding=UTF8&th=1