Do not drink water from park streams or from the lake without properly treating it. Designated wilderness areas are to be managed with few permanent impacts by humankind. Take only pictures and memories. Allow everyone to experience the entire wilderness. Keep groups small.
Smaller groups are less likely to disturb wildlife and other hikers.
Stay on the trail. Taking shortcuts or ignoring switchbacks destroys vegetation, causes more rapid erosion, and can make trails dangerous for everyone. Keep voices low. Leave radios and tape players at home. They are an attitude and a means of preserving wild lands and open spaces for everyone.