We usually get pretty wet on Splash Mountain. It's all part of the fun. One should expect to get wet on a ride entitled SPLASH Mountain!
I have got to agree with that!
I personally did not go on Splash (hubby and son rode it a lot) due to mobility issues (getting up and down). Hubby and son got a little wet, never soaked.
On KRR @ AK we all went together twice, as it is easier to board. I got so wet at one point that I could not have been any wetter if I had stepped into the shower fully clothed!
It (getting wet) is simply part of riding water rides. On a hot day it is great , on a cooler day... not so much!