We rode over 20 times in a row (they let us stay in, until the crowds built, and then they showed us where to go part way up the exit, and a CM was there to let us in line when no one was coming). I have to admit, we did some play acting, scaring dressed up people as we stood and rung out our clothes, while waiting to get back on. We brought a change of clothes and towel (they sell them as you get off of course), and plastic garbage bag for our backpack in case it wouldn't fit in the middle (which doesn't always stay dry). They would not let us leave our backpack behind.
We did find that the "boat" seems to do the same twirl just about each trip, and some seats (seemed to be always the same) stayed pretty dry. I can't remember which they were..but hubby thought it was the seats to the right when you get in.
We looked like drowned rats when we finally stopped getting on, and more than one person left the waiting line when they saw us LOL!
Of course, then we went and put money in the machines to squirt other people. I noticed when we were there in January, in the cold, that the machines were gone. A couple of years ago, they had a hugh heat blow machine to dry off with.