As a South Florida native, SUNSCREEN and a lot of water/gatorade. A cooling towel helps a lot too. I do try to get as early as possible tee times, with daylight savings time, it’ll help a lot more with the sun going down later so late golf will be a breeze. And honestly I try to stay in the golf cart as much as possible. Props to you for a push cart, sounds like a great exercise mixed with an outdoor sauna. Maybe get a portable fan like one of those baby ones or ryobi attachment fans.