Ultimately these ethics protect future generations. They are pretty simple rules to live by when in the outdoors. The problem is sometimes we forget or other times we make excuses. If you ve been in the backcountry sooner or later a candy wrapper gets carried off in the wind, the trail is so muddy you cut around, or maybe the switchback is so long it s just easier to go straight up the hill. It easy to follow low impact ethics in spirit, but it is harder to follow them to the letter of the law.
Most parks have special regulations unique to their area.
Most parks have some kind of restriction on how close to a trail and water you can set camp. Become familiar with these rules. Also know about special concerns. One thing from the Boy Scouts has not changed, be prepared. If you are traveling in an area know what the extremes can be and plan accordingly.