@fzburk - You hit the nail on the head just using the term "waterpark". Most of the locals [like me] I've recently talked to that are finding the park for the first time - really don't know WHAT it is. Just the word "waterpark" makes a person think of a safe, forgiving, padded artificial rock [lol - Schlitterbahn reference], safety engineered "play" area. Don't get me wrong, the Ford [I'll always call it that] river park IS a fun area to play, but it is still a river with currents, real rocks, underwater snags, and danger. Last weekend the PFD ratio was much lower than 75%, especially for kids tubing. There definitely needs to be a LOT of education/information about WHAT the park actually is for newcomers, maybe a few signs, and like Tom says - cooperation.
Note: Tubing is a blast on those features. It was the only time I didn't fall over and have to do a wet exit. A nice break every few hours.
