Walk-ups should be relatively easy to get. Right now, most dates are reserved for July and August, but that is 36 slots, and 24 more are held back for walk-in requests.
If you are at any Inyo N.F. ranger station (there are 4) at 11 AM the day before, you are sure to get a slot. (Call the wilderness permit office to make sure of that 11AM day-before time. 760-873-2483)
