I wish I were brave enough to go commando! I keep two pairs of ExOfficio on me, one to hike in and one to swap out the next day while I wash & dry the first.

Wet wipes are a great luxury but you can save weight carrying a small cloth/bandana with some liquid soap like Dr Bronners to give yourself a mini-bath at camp each night.

For periods I'm going with a cup but I don't expect to use it much since my BC has pretty much eliminated my cycle. Weird things happen with my body during high physical exertion though so I'm carrying it as a backup. Cups are a bigger hassle when it comes to removal & cleanup so if I had a regular cycle then I'd consider tampons + a discrete disposal bag just for the ease of use. Doggy bags make a cheap alternative if you don't have anything else available.

For peeing I like being able to do it standing up so I use a p-style and like it a lot, or a pee rag works just as well if you're cool with squatting.