My event occurred when I washed the car before the trip. It didn't hydrolock, but it ran like crap the whole way up there, somewhat helped by several cans of Sea Foam.. This was in 2008. We had the second Biblical flood on Friday when we went to the Harley Davidson plant. Luckily I had the presence of mind to cover my carbs with plastic bags before riding to the plant in Gordon's big-ass truck. Several others, most notably Kelly, weren't so lucky. I think he was the only one that needed to pull spark plugs and pump out water on Saturday, but a lot of cars had ingested some water.
Put some Sea Foam in the tank and run it through and it should be ok. In the meantime, order some rain hats. A bunch of us did after Carlisle '08.