Clear Creek route is frequently used for one-day trips up and down Mt Shasta from the trailhead, which can be pleasant to just have to carry a daypack. However, it is a significant elevation and means for slower hikers to miss out on a lot of the beauty along the lower sections as they climb/descent these in the dark. While most who want to break it into several days camp near the water sources at Clear Creek Springs, there is a set of decently flat bivouac /camp sites at 3333 m (about 11000 ft) elevation. No water, and more wind exposed, but they might save slower climbers an hour or two in the morning.