Alright, somebody has to do it -- Here's the step by step:
1. Time to go? Take your water bottle, trowel, and hand sanitizer.
2. Locate a good spot away from people, trails, and water sources.
3. Dig hole (6 inches) -- squat -- do your thing.
4. Done? Cup your hand, pour a bit of water and wash your bottom. You do this by using the 'balls' of your index and middle fingers to clear out any residue -- with an assist from the water in the palm of your hand -- which you tilt as needed. Repeat a few times (the final time is basically rinsing).
5. Pull up your pants (you did wear wicking/quick-drying undies, right?) -- cover the hole -- with LNT in mind.
6. Sanitize your hands. Return to camp.
Being right handed, I always pour water with my left hand and do the cleaning with my right. Keep consistent to avoid cross-contaminating water bottle vs. your cleaning hand.
Generally speaking, sitting on a toilet, there may still be a lot of residue (eeeww factor) -- but when squatting, I find that the bowel pushes out most everything much more easily and freely. So the 'eeeww factor' is not that bad -- once you've done it two or three times -- it may well disappear altogether. Now that's liberating, isn't it?
Just think: no more counting/allocating TP -- less stuff to pack (or burn) -- and best of all -- nothing to pack out (unless you are camping at places that specifically require bagging and carrying out your solid body waste).