You're a pro then! To me August is always worse! (but both are bad) I live in the Southeastern US so i'm used to the humidity, but August truly gets unbearable at times. I joke that sometimes it feels like you're swimming when you step outside.
Crowds will be more because its still summer vacation for our schools here. We went in July of '22, it was more crowded than our May trips in the past, but not horrible. We got to do everything we wanted. It was also waaaay less crowded than our October trip the year before.