Also I don't always use the scene to interact with dforce. Most of the time I create a primitive and place it slightly above or inside what I want Dforce to interact with. For me it creates better results and allows me to direct dforces flow better.
Recently I used the wind gizmo to push it slightly because it was catching on some skin. That worked well also.
I think there a script to pin a section in place during simulation but can't remember the name. Saw it holding a skirt or something. I don't mess with dforce much so my experiments are random.