Tips:
Beavers live in river banks. Stepping in a beaver hole in the dark is a great way to break a leg. Stabbing yourself in the leg with a stob is almost as bad.
Willows grow rapidly in the dark, and shrink in daylight. They eat backcasts much more readily after dark.
The Gallatin is not known for big browns, at least not BIG big browns. I used to live in Bozeman, and did the night thing a few times, and caught a few fish, but frankly, I caught a whole lot more, and a whole lot bigger, browns in broad daylight.
DG