I spent about 4 hours at a huge "Relays" type of track meet back in the D1h days...not hard, heavy rain, just a consistent Oregon drizzle...what Californians might call "a big rain." I carried a couple of small hand towels in my bag, and I wiped the D1h and 300/2.8 AF-S II off pretty frequently.
Near the end of the meet, my Nikon D1h began to malfuntion. I could not touch any of the rear buttons without the camera cycling through EVERY single option on the camera...ALL I COULD DO was SHOOT, in Aperture Priority AUTO. If I reviewed, the camera went thru every image on the card, and would not respond to anything except pulling the battery out, and turning the camera back on. After the heart palpitations stopped, I realized I had missed some events, and had gained about 100 gray hairs while futzing around in a panic as my camera basically shorted out if I did anything except to just SHOOT pictures and NOT touch anything.
It took my D1h about a week of drying-out time for the buttons and controls to come back to normal operation. I had a $3499 camera reduced to basically, a ONE-mode camera after 4 hours in light, typical, Oregon springtime rain. I bought the Aquatech the next week. it fit the D1h, the D2x, and the D3x perfectly. It works with my 300, 200, and my 70-200.