I'd paint the cover with matching wall pant and then install a power station big enough to block most of the cover.
The problem with backdrops is that, unless you're doing the whole wall, it never looks great where they end.
A few inexpensive rolls of sky and cloud paper from Hobby Lobby would also work. The top and bottom can be mounted to small wood strips and then hung from the ceiling or mounted to the top of the walls, rather than adhering it to the wall surface.
