As you have seen, depends on luck of the draw. We rode a couple of weeks ago and I was the "lucky" one with my back to the water when we went down the large drop. My wife and daughter laughed all day about the wave of water that came up over my head and drenched me. Looked like I jumped in a pool with my clothes on. My son sitting next to me was pretty wet too on one side, wife and daughter hardly wet at all. We scheduled our FP for the ride late in the morning so that we could ride before we left for lunch and if someone got wet it wouldn't matter.
As an aside, I was sort of disappointed with the ride. Didn't mind getting wet but there wasn't much to the ride other than one large drop.