It is one of those rides where you may get a little sprinkle, you may stay perfectly dry, or you could get soaked. Only the Shipwreck Rapids River Gods (and S1 and DH pouring quarters in the water guns along the sidelines) seem to determine your fate.
As I was not in the mood for a wet t-shirt contest, I opted out of the ride and sent D1, S2, and D2 by themselves. Meeting them at the ride exit, after each trip they begged to ride again. After the third time through the ride, they were all very wet!
As we left the attraction I saw two young boys leaving with their mom. They each had an arm around one of her legs and were grinning from ear to ear. "Mom" looked as though she fit in the "get soaked" category of riders leaving the attraction. As they passed by we overheard her oldest boy exclaim, "Thanks, Mom!" It made one consider that perhaps "Mom" had been a not-so-willing rapids rider. Then the small family turned in front of us, and I saw a bit more of "Mom" then she probably would have preferred.
I can only assume that she did not consider that wearing blue thong underwear with white cotton shorts made for an unwise clothing choice, since when they were dripping wet, there was little left to the imagination.