Yeah, all that is fair. But speaking to a point Texas Fight seemed to suggest, I don't know that it's fair to say the parents fucked up by sending their kids to camp where it was obvious they'd be sleeping in a flood plain. Even with all that historical data you cite, the parents assumed that the staff at Camp Mystic was equipped to respond to a possible flash flood, and I don't know if that assumption is a parental failure.
As I mentioned above, I've never before thought to ask what system Camp Champions has in place to respond to possible flash flooding conditions, and it's not like the chances of that area along Lake LBJ flooding are 0%. Maybe that's naive of me, and I'm sure I'll ask the question before paying the camp fees for next summer if Champions doesn't reach out first.
Along those lines, I wonder if riverfront or lakefront camps in the area will take some kind of hit next summer. No matter what assurances camps will provide, I can see some folks look at what happened on July 4 and say "nope."