South-west US/Hawaii Volleyball fun tournament in September

My girlfriend and I are travelling the US in september. There is no schedule yet, but we would rather see the west-side of the US or Hawaii than east/mid, because both of us have already been there.

From our past vacation experience we found out, that both of us don't like "being passive" all the time, like doing city tours or hanging at the beach constantly. As both of us like playing volleyball, we thought a common mixed-tournament or something similar might be a cool activity.

Now when I'm looking on the web for something like this, I mostly find things like tournaments of active university leagues or so. We'd also be fine with playing just with random people at the beach, but we dislike the thought of people interrupting mid-game asking to join or leaving the court.

As it's quite hard to find something reliable, does anyone have suggestions or experience? Especially Hawaii would be perfect!