Dh carries a backpack that keeps: wipes, antibacterial lotion,water bottles,baggie with meds,sunblock, extra zip lock baggies etc.
I like to have a small cross body bag: park ticket, cell phone, chapstick,my money, room key and camera
my son usually carries a string back pack with his snack, cell, wallet, and light jacket
my oldest dd would do the same
this year my youngets dd5 will turn 6 while we are there and she has a small cross body bag she wants to take that will have snack, wallet, and probably something to entertain her while in line
She will have a stroller this year again so we will have that to store bags in if we get tired of holding them. But in the past the kids have always kept with there bags