I use a fanny pack--excuse me, "waist bag"--though I wear it like a crossbody. Holds all the little stuff, stays secure, almost never needs to be taken off since you can just shift it to one side and close ride restraints over it.
I used a Radley small leather crossbody on our last trip and it worked well. I prefer larger bags but am trying to make the switchover to save my shoulder and my back. I barely knew it was on my shoulder. I carried my phone, a small wallet, some tissues, a little tin with some Motrin and a small bottle of hand sanitizer.
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