Ya beat me to it, JD. Prolly way more fish scared away before you're even in view.
Stealth includes shadows, reflections, vibrations, sound and colors. I'm of the opinion that doing anything that let's the fish know something's out there lessens your chances. Fishing small creeks I try to be aware of the sun, what's behind me (sky or trees), and I stay out of the water as much as possible. I keep my rod low, and I try to keep as low as these freakin' knees will allow. Drab colors fer sure.
I was fishing a small creek in the Driftless area a couple weeks ago, and bushwhacked in to a low riffle below a nice pool doing all the things mentioned above. I poked my head out, everything looked good, so I came on out onto the little gravel edge. A nice trout darted through from down below (I wasn't too worried about things down that way) and right into the pool. You know he was yelling "Hide, Hide, HIDE!" the whole way. Screwed that whole section up.