This weekend, we had a very violent storm roll through the campground. We were under tornado warnings for about an hour and a half. No tornadoes formed, but we had massive lightning and the hardest rain I have seen in years. The lake is right at that east facing "sawtooth" for the county lines to the WSW of Bloomsdale.
Surprisingly, we did not get much wind. I dunno if there wasn't any, or our lot was just sheltered from it. I did have a 2-3 in deep 'river' running underneath my camper from all the rain. I had my front bunk and the slide out. My buddy had both bunks out as well as his slide.
Despite the torrential rain, there wasn't a single drop of water infiltrate my camper, which surprised me. I was pretty confident that it will remain dry in more moderate rains, but deep down I always figured that a heavy frog-choker of a storm would overwhelm its ability to stay dry.
My buddy had a little drip that came from his kitchen cabinet. I pulled his switch panel out to investigate and saw a bit of wetness on the 'floor' of the cabinet next to the microwave. In a lull in the storm he looked and saw his gutter over his awning was clogged with debris and pooled some water. We quickly cleaned his gutter and the leak abated. I think there is a screw that holds the gutter on that might not be sealed up properly, but it's behind a plastic strip or 'cover' that looks like an absolute bear to remove and replace.
Overall, I am impressed with the weather resistance of the roo's. I know some people have had leaking issues, but I am happy to report that (at least for us) that the roo's can ride out heavy rains no problem.