One morning as we started in the dark because of expected high temperatures that day we struggled as we left the village to find the trail. Suddenly the the trail was outlined by bright little white pieces of toilet paper along each side. As helpful as we found this I recommend carrying out all toilet paper. If you bury it animals or ? seem to expose it again. It would be nice if people would make an effort to bury the solids. I have stepped off the trail and found big turds laying on the open ground.
My personal method is to carry a yellow bandana folded to fit in my pocket. I have perfected the drip dry pee shake which also tones the buttocks. Then I unfold my bandana one or two folds and blot. And being a nurse who has seen way more than I want, I know pee is sterile. There is no bacteria unless you have an active infection, I refold the damp side in and back into my pocket it goes. I rinse the pee rag out at night. In the interest of science I have given the system the sniff test and the rag does not smell until the third day if you don't wash it at night.
I very rarely poop in the woods probably because all the wine the night before sets things loose early morning. But I carry a thick paper dinner napkin or or too, a hand wipe and a doggie bag. I bury the soid and carry out the tissue.
And please disregard any advice to just take toilet paper from the cafe or albergue. Many cafes are out of toilet paper so bring a partial roll with the cardboard center removed from home.
The best advice is Leave only footprints!!!!