We also have a 5er that the awning covers the slide. It is my refrigerator and stove slide. The awning does cover enough area to sit under, but it isn't the same as if there were no slide. Our previous Class C we were able to adjust the awning angle. Of course, depending on the angle of the sun....depended how much shade. I was looking at those screens, that you can attach to the awning, as an idea too.
Kenny n Karen
TV: 2007 Chevy Silverado 3500 DRW - named Alice
RV: 2012 XLR Thunderbolt 35x12 - named Thor