When reading about "Leave No Trace" principles, I have observed that "no trace" means different things to different people, depending on the circumstance and the individual's philosophy. For human waste, I have seen various recommendations, including pack out all waste, only solid waste, only toilet paper, or just bury it all so it can't be seen and will decay. Does LNT mean don't build campfires at all, or only in existing fire rings? For you, does LNT mean you can't swim (an leave behind traces of insect repellent and/or sunscreen in the pond)? If I broadcast my coffee grounds into the woods so that no one will ever see them, am I leaving a trace or not? Are my carbide tipped trekking poles leaving a trace (those rubber tips don't last too long). So given that it is almost impossible for even the strictest LNT advocate to really leave not trace behind, what degree of a trace is typical for a long-distance AT hiker?