Hi all - looking for some permit help.

My father and I have an overnight permit for Aug 18/19, with my father listed as the sole leader on our trip. Unfortunately, my father is now unable to hike this month due to recent shoulder surgery. As such, I'm trying to 1) Change the leader designation to myself and 2) Add a friend that will now be taking my father's place.

Excuse my naivety here because I know how finicky the permit process is - is there a way to change this info so my friend and I can hike in a couple weeks? The site doesn't seem to allow for changing of / adding participant names.

Similarly - has anyone had any luck contacting the Mt. Whitney Ranger Station/Inyo Interservice Agency recently? I've been calling/leaving voicemails almost every day for the last week and have not reached anyone. Is there currently a working number?

Closing in on launch date here and I'm getting nervous about adding my friend to the trip.

Any advice/direction would be much appreciated.