Well they are all adults so I am out of the decision making loop. Had I been asked to go get her, I would have suggested she call some friends in Atlanta. She did say there are no rental cars available.
I was asked to try to get the luggage re-routed and had no success. According to the luggage tracker her luggage is still sitting on the plane from Bhm. To call an agent, it is something like a 90 minute hold time. She is going to handle it in the morning.
Just go to bed and get a good night’s sleep - and she should do likewise. Her luggage will get to her in the next day or so.
When I’ve gotten separated from mine, I was actually happy not to have to drag it around. The airline knows where it is and where you are and they will bring it to you.