When we were packing the bag for the parks, we felt like all that we forgot was the kitchen sink! We were packing for 3 babies, so there was a lot of stuff, but we used everything! We packed bottles (and bottled water,) formula, baby food (all 3 meals), a lightweight blanket (we used these to give more shade to the stroller while the babies slept,) a change of clothes, toys, diapers, lots of wipes, and a few snacks. We definitely used all of this. Good luck packing!