try a couple of "mister" hoses suspended from shade trees, or one of the foldable canopys...they work very well, even with the high humidity we have down here...

also for the older folk.. the neck bandanas with the hygroscopic gel can be a tremendous help to keep the core temp down.....soak it in the melt water in the cooler...

watch the urine color and output..

just came back from a shotgun match 91F, 95 heat index