These are the neck fans we have, and they worked amazingly well for us, both at Disney and at home. I am laid up on the 2nd floor of a house without a/c and it's been a lifesaver, and DH wears his when he mows the lawn or works in the garden.
https://www.amazon.com/gp/product/B09DYRQ4L9/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
We do NOT like the cooling towels. No matter how well we rinse them at night, they don't seem to dry in the Florida humidity and end up being wicked stinky after 2 days. Instead I freeze washcloths. I fold washcloths in quarters, soak them, put them in ziplock sandwich bags, and freeze overnight. These go in an insulated lunch bag (it's really thin, just folds over at the top, no hard structure to it) in my backpack. They stay frozen and then cold for quite a while and make a great wipe down in the hot afternoon sun. For some reason, the washcloths don't hold the stink like the cooling towels do.
I used to lug frozen water bottles around but now we get cups of ice water from the QS stands. We bring the little bottles of flavor/sweetener drops to add to the water cups. For some reason drinking plain water makes me bloated in no time, but if there is some sort of flavor in it, I can drink a lot more.
Feet: In the morning, I spray my feet with antiperspirant and let it dry before putting on my socks. Keeps my feet from sweating as much and wearing socks keeps the blisters at bay. I can only wear crocs and once damp feet start chafing in the crocs, large bloody blisters are guaranteed. Keeping my feet as dry as possible and wearing socks (with a back-up pair in a backpack) keeps my feet blister-free.
Avoid chub-rub (chafing of the thighs... or other tender areas) at all costs. I've been known to rub susceptible areas with antiperspirant stick and then liberally dust with powder to help with this.
Ponchos: I bought ultralightweight waterproof ponchos at Walmart. They aren't plastic; they are made from a thin fabric that is significantly cooler and far less sweaty than regular ponchos. I think they were $6. I think this is the one we have:
https://www.walmart.com/ip/Frogg-Toggs-Adult-Emergency-Poncho/35736507?from=/search
Obviously, we strategically schedule watching shows or having snacks/meals to take advantage of the air conditioning, but I need to bring a thin sweater or gauze shirt with me. Sometimes when I am really hot and go into the a/c, I chill down far too fast and it's almost as uncomfortable/nauseating as being too hot. The thin gauze shirt seems to keep this from happening. Once I am acclimated, I can take off the shirt- or not, if I'm just "too cool!"
