OK, this will be rather frank, coming from a woman who's been backpacking or otherwise getting into the outdoors for 66 years.
Some of us have hemorrhoids (varicose veins of the rectum). They are a common complication for us women who have given birth to several children. I dare anyone to try rocks, leaves or grass on those! They make that area a lot harder to clean and also make it more important to get that area thoroughly clean to prevent further irritation.
In addition, due to a knee injury 20 years ago, I can't squat down completely, which means there's more waste left on me to clean up.
I've had no problems with infections after urinating, but I do use a moist towelette at least once a day to clean the entire perineal region (wiping front to back). I noticed long ago that female horses after peeing stayed in the position, straining and then relaxing several times to get rid of drops of urine. It seems to work for me.
The Turkish method (a narrow hose connected to a water tap for washing off the nether regions) worked fine for me while using toilets in Turkey. When I try to imitate it out in the wilds with a squirt bottle, the water runs down my legs into my pants and shoes. Forget it!
I carry TP (actually, sections of paper towels) and moist towelettes. The used ones go into my garbage and are packed out. Perhaps not the greatest solution, but the only one that works for me.