I bring a lot. But surprisingly it all fits in a little make up bag. Small tube of Advil, a couple bandages, moleskin strips (sticky), extra hair elastic, mini deodorant, chafing stick, chap stick, extra 1-2 contact lenses, couple tabs of bonine, a couple Benadryl chewable, a couple ziplock bags, a charger for my phone, tic tacs, small sun stick or cream and Surface wipes.
the make up bag with the above items goes in my side sling bag, along with a mini umbrella, poncho (and not an over the head one, we may a little extra for the button down ones with the hood!) I have a refillable 12 oz insulated Owalla bottle that goes in my side pocket on the bag. I have ear clips to hang my Minnie ears if I’m not wearing them. I hang 1-2 anti back tubes off my bag. And if I know it’s a popcorn kind day I’ll hang my popcorn bucket off too! If it’s calling for a rainy day, or if we are doing water rides I also bring extra socks. If temps are going to dip I’ll bring a long sleep or packable jacket.