Be very careful with the Awesome... It is, indeed, a marvelous cleaner; very strong and at a good price ($1), but, full strength it can do some serious damage and I definitely don't recommend using it, at any strength, on the sidewall of your trailer. At almost any strength it will remove all the wax and, according to some "reports" on it from others, can even remove some of the clear coating on the filon and etch the glass windows.
For those reasons, I wouldn't use it on the awning, either. It may not damage the awning, but, the potential for getting it on the trailer's walls is fairly high. Good stuff, but, IMHO, too strong to use regularly and diluted to where I would feel safe using it, there are other cleaners that do better.
My recommendation(s), what I've found over the years that work well, are Tilex for cleaning the awning. Spray liberally, roll the awning up...let sit for the duration of a cold one. Unroll the awning and hose off. Stubborn spots can take a second application and more serious scrubbing, but, by and large, the awning comes out clean and it won't damage anything. For cleaning the trailer walls, I use regular combination auto wash and wax formulas. Gets the trailer clean and leaves a shine. Won't replace the occasional waxing, but, for in-between times most of the better formulas (Turtle Wax, Macquiar's, etc.) do a good job. If you've got black streaks, Simple Green will take most of them off, but, you'll have to re-wax the area...most anything that takes a black streak off is also removing the wax (the black streak is actually in the wax surface, not just "on" the surface - that's what makes them so hard to remove). For wax, I like NuFinish. Got turned onto that wax when I had a fiberglass cabin cruiser; I've tried other waxes, but, always seem to wind up back with the NuFinish. It isn't really a wax, but, more of a polymer coating and once you get a couple of layers on it holds up well, cleans easily and I've found that it is about as easy as any others to apply and remove.
Those are what work for me...now, if the darned trailer weren't 35' long and 12' 6" high, I might be inclined to actually use them more!