i agree with those that recommend Body Glide. I went with DD, 11, the week before labor day.
Our feet blister easily so i was very worried about our trip to Disney because that can ruin a trip. It was DD first time so we had alot to see with little time to relax.
We used Body Glide every morning all over our feet and between our toes. Hopefully you can get it on
Amazon or a sporting good store. It's wildly popular with athletes in my area and Dick's Sporting goods only had two left. I bought them both.
Body Glide looks like a solid deodorant stick. It was not sticky in fact you don't realize you have it on.
We walked all day from morning until park closed for 6 days.
Not one blister -not even a feeling a blister was forming.
We also changed our shoes -never wearing same pair twice in a row. I brought my tevas and nike air rifts.
I bought a pair of go walks with memory foam but i didn't like them. My feet aren't wide but they felt too tight with socks and without socks they squished around on the plastic memory foam pad.
DD loved the go walks and wore them on the trip switching off with her underarmor sneakers along with a good pair of cotton socks.
Good luck!!