One of my biggest problems was finding a bag that held what I needed but was comfortable enough to wear all day and didn't get in the way. I have 4 kids and I didn't want to lug a huge backpack around all day so I made good use of the stroller and carried a small bag with me all week. It's a Kipling Alvar (large). It has several zippers for organization which made it easy to know where my cards/cash were or my phone. It held my cards/cash, iPhone 6, a diaper change in a ziplock baggie (1 diaper, 6-8 wipes in a ziplock baggie and a large disposable changing pad) the rest of the diapers and wipes were in the stroller. It held an applesauce squeezie for emergency toddler munchies, a few dum dums for meltdowns, a 15 pack of target brand wet wipes (they have the right active ingredient to kill the stomach bug vs. wet ones that do not), hand sanitizer, gum, mints, a water bottle (or sippy cup) and had room leftover. It was nice though because minus the water it was lightweight and flat against my body so I didn't have to take it off for most of the rides.
I've been several times and this was by far the best bag I've used.
I've been several times and this was by far the best bag I've used.