It seems that we've just had very different experiences at this restaurant then. The time I dined there it was very laid back and my dad, who is hard of hearing, had no issues understanding me at a normal volume. I can't recall a single table in what I consider park attire (t-shirt, jeans). It's possible I also just considered it to be quiet because it was in comparison to many other dining choices (like Ohana). I do recall seeing children, but none younger than probably five or six and all were well-behaved.