Wow great pictures. I never even looked at the corners of the sliding window, I could see daylight at the weep holes and that is where I thought the water came in. I am going to have to wander through the 2 feet of white******in the backyard to look at the corners of the sliding window this weekend.
I guess some good has come from driving in the slop with the camper on. You could follow the path of crud right to the leak site. Just glad it was your camper and not mine.:) Of course you were out with the camper and I can't even get the truck near mine right now because of all the snow.