I've had 2-steps awnings on my last 2 trailers and loved them. They have a knee-flex action which allow them to take more wind than the standard 8500 awning and have a feature that allows the awning to tilt at one end so rainwater runs off, then it rises back up. See info below from A&E awnings (if I can get it to attach):
The name says it all: simply unlock and lower, and enjoyment of the outdoors with the A&E Systems Two-Step awning begins. It is a manual awning, yet it has many of the same features as our prestigious WeatherPro Power awning.
Two-Step’s patented Knee Action Design™ allows it to flex in moderate wind to prevent damage. In addition, its unique spring arm mechanism automatically releases accumulating rainwater. This prevents the fabric from stretching and prevents damage to the roller tube.