Following the inspiration of Rustic Eagle and others in our seasonal campground, I opened up the awning, mopped it with a solution of Spic-n-Span & bleach, then rolled it up to soak while I scrubbed off the roof with the same solution. Since my site has cable t.v., I leave the antennae down. Roof was pretty green under it, so gave that area a little extra attention. Once the roof was cleaned and rinsed, I reopened the awning, rinsed it, then left it out to dry.
Finally, I opened one more thing . . . a beer!
Sat down in the zero-gravity lounge chair (with the dog in my lap) and admired my work.
Today, it's wash the dog and the truck!