The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
I would also suggest that you get a fly line that has a welded loop at the front end, to make it easier to change leaders without a nail knot.
and then add a 1.5 mm tippet ring to the end of the leader