On my short daily runs with my pup around the neighborhood + main street I only take his leash, poop bags and holder, and a treat bag around my hips. On longer runs I wear a flipbelt which can hold surprisingly good amount of stuff including my keys and phone.

Right now I have him drink before and after, but eventually as our distance increases I plan on getting a ruffwear pack so he can hold his gulpy and poop bags.