“I doubt all 100+ deaths were all staying at camp Mystic.”
I doubt all six camps were founded by newcomers.
I doubt all the original founders are even still alive. That whole area has been inundated with people moving in from out of state for decades. I barely recognize the area from even 20 years ago. I still have friends living in the area. Kerrville used to be just a spot in the road that didn't even have a Walmart. Lots and lots of newcomers now.