Just kicking an idea around...

I'd like to build a PSS flying wing, say a YB-49 or a B-2, but my nearest slope is a fair distance away so I'd want to fly it at my local field on a bungee as well. It wouldn't need to perform like a competition glider, but obviously the choice of airfoil would be more critical than usual (many slope airfoils are still eyeballed).

I'm sure someone has done this before - how well did it work?