I'm still on the fence about bringing a bag into the park. Over the years I've tried a fanny pack (Dear God, still ashamed of the pics from that

), backpack, and small cross body purse, and still haven't found a bag I like or that works for me. Ideally I'd just bring my tiny pocket wallet with ID, cash, and credit card and nothing else, but realistically I know I'm a packrat and bring too much crap. LOL
DH likes bringing a backpack (which is great because then I don't have to carry anything), and it really comes in handy when we start out wearing sweatshirts in the AM, and are sweating in the PM. But, it kind of becomes bulky if we go on a coaster or water ride...plus you have to go through the bag check, which stinks.
Does anyone have any suggestions? I'll bring my large Michael Kors purse with me on the plane, which is perfect for flying, but won't carry it around the park with me, so I need something else.
I'd like to be able to bring a disposable poncho for each of us, small sunscreen, bandaids, travel-size Aleve, some water flavor packets, as well as my phone, billfold wallet, and of course sunglasses. We'll each bring a cold water bottle into the parks with us and just fill it at the water fountains.