The Dudley Doright flume is shaped such that it directs water into the log boat on hills, meaning you will be drenched from at least the waist down. If you are going on that or the Popeye Barges, which you should because they are great, just understand you will be soaked exiting and plan accordingly.
Jurassic Park will wet you a little, but you don't necessarily have to plan anything special - you can dry afterwards reasonably easily.