The thought of going bagless gave me anxiety. So I said I would do it just for HP. I was with my husband who wore cargo shorts. Ah, but I wanted to take my phone in case we separated (and to take pictures). So I had a pair of cargo shorts that would hold my phone easily but not much else.
So day 1, the whole family goes. DH has the tickets and express passes in his pocket. We each have our phone in a pocket. And he has his wallet. Worked great. My plan was to go back to the hotel and get my bag after lunch but I didn't even need it. We did end up buying lanyards that held the express passes--much easier. They sell them at all the gift shops.
Day 2, it's just me and my one son going back for HP. My lanyard wasn't big enough to hold both passes, tickets and money. So I used my waterproof lanyard that's about the size of a deck of cards. I bought it in Mexico, but I'm pretty sure I saw some in the shops there. So that was enough for passes and money, but nothing else. Cell phone in pocket. That worked fine for me for the 3 days we were in the parks. I was able to get along with just that. It was so freeing. I'm not a big picture person, so my iphone was good enough for my use. Didn't need my camera.