I plan to day hike Mt.Langley from Cottonwood lakes trailhead sometime next month. If I were to camp the previous night in the trail head camp site (I am assuming there are camp sites there), do I need permit ? I heard that for day hiking , I dont need a permit. Is that correct ? I dont plan to camp on the trail going up the mountain. If I need to get a permit for camping, where can I get it ?