Let's have Beyond LNT.
I think the LNT principles are the minimum or lowest common denominator principles for wildlands travel. I firmly believe that good LNT practices should include packing out anything that doesn't belong in the wild - whether you carried it in or not, and renaturalizing human impacts you find to the extent that it is practical.
The impact of large mammals builds up pretty fast even when most folks follow the LNT rules and even when the backcountry is "designed" for lots of human traffic as it is in some national and state parks. That is why LNT is not good enough. It does not keep the backcountry pristine. Far from going too far, LNT principles are too wimpy.
In areas with moderate use and little regulation, the only way to avoid wrecking it is for everyone to act as if they were being hunted. If everyone simply follows the basic LNT guidelines, they WILL leave traces. If they acted as if a murderous tracker were on their trail, perhaps concentrated use would not be necessary. Hey, a new job for the park rangers!
I am a little worried that some folks carry UL a little too far, and depend on woodcraft to make up for inadequate equipment.
I support incorporating a standard into UL principles that a ULer should carry all the gear needed to avoid having an impact on the environment. Any lesser standard takes us back to the old woodcraft practices where the environment is marked and marred for our comfort.
After lots of squirming, I have come to believe that concentrating impact is a good idea in high use areas -- where "concentrating" means designated camping areas, privies, designated fire rings and so on. Problems occur when the designated areas are not appropriate, but that is another issue.
The LNT problem becomes acute in desert and canyon environments.The separation of human impacts from water sources is more critical. Human waste disposal is more difficult. Human traces can last centuries. The cost of human impact escallates, and the obligations of wilderlings increase proportionately.
SPECIFICS you asked about:
Camping areas: I personally camp so a good tracker, such as I am, cannot find the site when I leave. I believe that is the minimum standard.
The issue of free-standing tents intrudes here when camping in hard-rock country and canyonlands and sometimes in high desert. Often the only place for a non-free-standing tent is too near water - because that is where the soil is. Again, I would apply the general principle: A responsible wilderling should carry the gear needed to avoid leaving an impact. If traveling in country where a free standing tent is the only way to camp away from water sources, then carry a free-standing tent.
Dishwater: Real backpackers drink their dish water. Ultralighters don't have dishwater. They freezer bag. SULrs bulk bag their food to save packing weight. Like BPrs they drink the water and preserve those precious calories.
Toilet practices: Depends on the ecosystem. A savvy wilderling knows the difference between biologically active soils and dead or mineral soil. Anyone who can't tell the difference is a dunce. Poop in active soil. In canyons, blue bag it...period.
TP? Ryan, for the Goddess's sake, don't use those blue shop cloths. They last forever. I ran a test in a highly biologically active area. Blue towels lasted an average of 6 months!!! And they were still blue! Regular TP dissolves pretty fast. If you need a heavy duty wipe, Kleenex makes a heavy, soft paper towel that disintegrates 3-4 times faster than the shop towels.
The really super solution is a backwoods bidet -a cap with a few holes on a platypus bottle. No TP and a better wash up. No more skid marks.
Campfires: In appropriate environments, campfires seem OK. But I am skeptical whether the general packing public knows squat about fire ethics and safety. I've seen too many fires built on the forest duff that have burned acres, for example. Given my druthers, I'd limit fires to contained stoves using detritis or to officially sanctioned fire rings where the impact is competently evaluated. Even then, fire rings tend to become trash heaps with foil scraps, rusty cans and other discards. And if you will take a close look around any area that has had a fire ring for several years, you will find that incompetent ground apes have cut live wood, damaged trees and other woody plants and generally changed the local environment.
Now, you can build fires responsibly, and I can build fires responsibly, but our having that opportunity in most places means there will have to be a fire ring and that means other human critters will be building fires and they have not learned anything in 2.5 million years. So there.