You gave me so many ideas, I use a diaper bag backpack for my sister I'm a care taker for her she has disabilities love the one I have it has 4 insulated pockets they work perfectly for any thing we need to keep cold for her
I took it on every ride I was on. We didn't do Kali River Rapids or Flight of Passage (my girls weren't tall enough) but I could put it in the floor between my feet