When I started fly fishing in the smokies i couldn't afford a guide. I fished HARD for a full year and barely caught anything. Stick with it and you'll soon learn where to fish, where the fish are holding, what they are eating and when a good time to go is. A guide will speed the learning process up for you, my way was by process of elimination.
Everyone's advice given above is correct but I'd bet the thing that would help you the most is the suggestion to hike a minimum of 30 minutes and then start fishing. Go after the dumb fish until you get the hang of it and get some confidence then you can try some of the more pressured fish.