I have not seen a backface culling for Nurb CV's, only for Polygons.
I friend once told me about a camera trick where you adjust the far clipping plane. Go to an orthogonal view that works best. Under the Panel select camera and in the attribute editor adjust far clip plane to be in center of model. With clip plane adjusted you can only select what is within the clip in that camera view. You may want to turn on the camera display to see the clip.
Hope the hack is useful!