In the campground there are several trailers that are barren of occupants. There are others that are busy with activities, and there are both types that are in dire need of roof washing! We used to do ours every year and now have a service do this task. It's a tricky and slippery project. Here's what happens when it isn't cleaned. I've been roof-watching this one for almost 15 years! Yesterday it was is FULL bloom!