Chances are, they're gonna smash it, atleast thats what my experience with night fishing the soho have been. Hard hits. Even if they don't hit it like a train on the run, if you're stripping the streamer back to you fast, you'll notice when the fish grabs it and the fly stops. Also night time means you can just about throw leader shyness out the window and fish some big tippet. Gives you a chance to lay into a fish, something you'll probably need for those strong browns.
"I've got to stop wishin, I've got to go fishin"