The county I live in is about 30% masks 70% non-mark indoors. Outside walking or exercising I would say about 99% non-mask. It's not even June and it's pretty rough out. I handle the heat very well but my wife and children do not. Our initial trip was scheduled in March before a
Disney cruise. We have about 100 expiring DVC points that need to be used by October. I rescheduled our WDW portion of the trip to June, then to August.
As Floridians, we typically do not travel to WDW mid-summer as it can be miserable. Because we have expiring points, our plan was to go and enjoy the parks in the early morning and spend more time at the pool. Masks being required at the pool area is a deal breaker. Not a single pool in our area of Florida, our community pool, nor the beaches, require you to wear masks (for some reason my community pool took the lounge chairs away, so people have to sit on the pavers).
My family trip will wait until next year. Our youngest daughter will be 3 and a half so she may enjoy it more anyways. My oldest daughter complains that it's too hot at 10 am, so she would never make it.
My wife and I instead are staying a night in a Copper Creek Cabin for a little weekend getaway. It's something that we would never otherwise be able to do due to the high point cost.
I'm glad you are prepared for the masks in the Florida heat. But as the old saying goes, "everyone has a plan until they are punched in the mouth."