Check out Hugh's Smoky Mountain Guide Service site for some patterns. Check out his reports for some reports on what he was fishing on the SoHo. You'll get it figured out. I would suggest to watch very carefully what the trout are taking. Are you seeing them take a fully emerged dun off the water? Or are you seeing a bulging rise which would indicate they are taking an emerger? Trout taking a dun also generally leave a bubble behind.
"Here fishy fishy."