I was just up yesterday, and I went with my usual option on long day hikes like this. I didn't feel any need to deficate. Something about the elevation or the exertion or ???. Lucky me. However, I did see six WAG bags left baking in the sun along the trail and 2 more "hidden." Seems to me that the WAG bags are not a good solution. If I saw that many without even looking for them, how many are there in total?

I don't see a need for a new solution when the park service already has a solution that is working in other locations, it's called a solar toilet. Yes, I know that the idea of a solar toilet on Whitney is anathema, but that is the best solution whether the Park Service recognizes it or not.