If you try a slow stalk, they will walk off and leave you. Use slow, smooth, movements, they will spot fast, jerky, movement. Get one of the little bottles with UNSCENTED talcum powder and use it often, pay special attention to the air currents around your knees. As far as cammy, don't get too light or too dark, they will pick out the contrast. Jeans and a cammy tee will work if the jeans are not too faded. A good pair of boots will stop all but the largest rattlesnakes, rubber boots with your trousers in them will stop everything. Semper Fi! Bill