Another vote for shade cloth or nursery cloth. I have the exact same situation as you, except I don't have a roof. The coach is parked alongside my two story house. I built a pole wall, on the sun side and used the shade cloth (screwed it down) 8 years ago and I figure I have about another two years left. Your situation would be an easy install. The cloth comes in long rolls (4' x 100' or longer). I would just run the rolls horizontal and screw them down with large washers. It will last for years.
The cloth also comes in colors. I did mine in tan.