On a recent amusement park trip I used a running pack ---fancy name for a fanny pack but very slim and fit under my shirt I was wearing...just held money, credit card and phone. No room for anything else. I'd never wear a big fanny pack or
crocs BUT know that is what some people do for comfort. It's vacation and I wouldn't worry about it. Last Disney trip first trip without a purse...made hubby and sons carry my stuff in their cargo shorts pockets since I'd been the pack mule for years!