Our squad was stubborn and ended up finishing 5/6 stages. Almost made it to the end but sloshed around too much on the rifle side. And you're right, it rained steadily almost the entire time we were there. I'm thankful that I didn't short out any camera equipment! You can see/hear the rain coming down starting about 1:45 in:
At least I know my equipment (sans fogged up magnifier) runs in the rain!