Regarding the holes in the wall thing ... I, too, have that problem but can't do without my design wall!! I put those hooks up that you can pull the tab and remove them with no damage all across the room every 15" or so. Then I clipped circular curtain hooks to a large piece of warm and natural. Presto ... over 12 feet by 8 feet of space and no holes in the wall. I use it daily. You could put it on the wall behind the bed perhaps.
Before I moved here, I also had a design wall with no holes in the wall. I used one inch styrofoam (insulation) and cut to fit between floor and ceiling. It took 3 sheets to cover the wall between my bookcases. I taped warm and natural over these sheets (like a package), bent them very slightly and pushed in tight to the wall. That was better than what I have now because it could be pinned into easier.
Good luck!!