What I don't need to lug around:
- cups of ice water are free at all quick service counters.
- tylenol, allergy stuff, ibuprofin, band aids, etc are all free at first aid.
- sunscreen. I don't usually stay around the parks for high sun so I can get to this after I leave, my allergies also cause skin irritations and it doesn't mix well with sunscreen so i'm more a loose clothing that looks like I'm dressed wrong as it's the most comfortable with sun for
Seasons where it's warm in morning and evenings:
daughter, phone, magicband, wallet (various discount cards that work around disney+id needed for discounts and medical cards), some pocket money and cigarettes is generally all I bring to the parks.
Seasons or days I think a change of clothes might be wise:
same as above + a change of clothes, especially socks in a small bag that I locker at the front of the park. sometimes I'll put in some form of an electrolyte drink for the ride home in the locker as well.
These are free from first aid if you didn't know.