Excessive Biking, and Maybe a Few Wild Browns

My plans for tomorrow are to bike about 40 miles in total to fish a wild brown trout stream that keeps defeating me. Oh, yeah, and I'll get a lot of exercise and keep warm in the cold but sunny conditions. I'll be up before the sun, and by seven thirty I hope to be on the water. If my luck with the big brownies doesn't hold out I plan to visit a few streams out that way that hold native brook trout. But I'd really love a nice eighteen-twenty inch Salmo trutta. 
What flies do I plan to use? Big nymphs, maybe small dries if there are risers, midges, or streamers. Wish me luck!