No matter what you do, if you are using a LF camera for street work, the heisenberg uncertainty principle (and hence Schrodinger's cat) apply. You cannot take a picture without your subject knowing that you have a camera. Get used to that idea.

By the way, I have taken to using a Crown Graphic with a Metz hammerhead flash as a night / bar camera. It is great, and very much in the press camera style. On the other hand, I don't use movements or anything, I just focus with the rangefinder.