We've been over the mid-air recovery options before. It seems you are missing Gwynne's major hint: "land". What are the possible options that she might call "landing"?
The only option I can realistically envision is a large inflatable raft set up at specified GPS coordinates, with guided parachutes dropping the fairing halves on the coordinates and thus on the raft.
The fairings under chute would be moving pretty slowly, so they aren't real dangerous and the raft could be deployed and controlled by the ASDS support ships. The chutes should have enough cross-range to set up the raft ~10 km away from where a ballistic trajectory takes the fairings, so they don't crash into the raft or support ships in the event a chute fails to open or loses control.
IIRC the support ships already stand-off from the ASDS by about 10 km, and I've seen reports that they can see the fairings falling into the ocean. So the stand-off location can't be too far away from where the ballistic trajectory takes the fairings, but far enough to not get hit.