I’ve hiked Whitney several times, but never the MR. I was wondering if this itinerary sounds feasible:
8/11 Drive to Whitney Portal(arrive around noon), park and hike(leave around 1pm) to UBSL Camp overnight.
8/12 Leave UBSL for summit around 7am (with daypack only). Return to UBSL and camp.
8/13 Hike back to Whitney Portal. Drive home.