For brownies, I'd starting fishing at about the time the sun hits the horizon in the evening. The darker, the better. I use either a minnow fly pattern or a black leech on a slow sink/intermediate line. Depending on the lake, the Browns will often cruise the shallows after dark. Strip the fly in quickly using about 3-4" strips. And hang on . . .

Bring a flashlight as its pretty tough to tie a knot in the dark.