O.M.G.
So yeah, that awful noise from the right front: coat hanger.
Yep, the coat hanger got left on the RF after I had the caliper off to replace the rotors.
That's what I get for working on the car when I'm dead tired at 11pm. The shop things the bearings are fine, so I'm gonna give 'em a go as-is.
I wonder how much the shop will charge me for a "coat hanger extraction".
Chances are my bearings still aren't 100%, considering the temperatures I generated at the track day, but I should be able to get to Lovelock and back for the event this weekend.
...how embarassing.