What's the big problem with just holding it in for 12 to 36 hours?
You can't be serious. How much enjoyment of the Whitneyzone can one have if forced to "hold it in for 12-36 hours" and deal with the discomfort. Altitude affects everyone differently, especially those with a touch of AMS, and holding it would be an impossibility. No thanks, no interest. This is totally unrealistic and apparently many agree.
Separately, when a friend and I hiked to the summit Oct. 2-3 we saw several used Wag Bags discarded along the trail. There were several left behind near our camp at Trail Camp and I saw two left behind on or near the summit. Yes, I realize the MT experiences high traffic and there will always be some noncompliant bad apples but even so I found the used Wag Bags left behind really irritating and it did dilute the experience somewhat. Twenty years ago when I hiked to the summit along the MT and when there were toilets I saw no trash/human waste left behind on or off trail.
Letter printed, signed, and mailed.