Wear your poncho's and make sure you put your hood on. Some on this ride will get very wet, some only a little. On a hot October day we all rode this ride DD had planned well. We all had poncho's but DD forgot to put her hood on. Her side went right under the falls. All the water went down her poncho. Yes she got very, very, wet. DH did not wear a poncho and stayed dry.
There is a center storage area that zips up. For the most part things stay dry. I take a plastic bag, tie up everything in the bag, then put it in the center. All my things stay dry.