If you still have those slots, PLEASE do not release them. My wife and I filled out 8 applications and all failed. We would be ecstatic if you let us take two of your slots, or even join you during the hike. We aren't fast, but we have done far more grueling hikes than Mt. Whitney (the Pemi Loop in the White Mountains comes to mind) and we've hiked above 12000 feet numerous times.