Thanks for all of the info!
After doing a few more searches I came across this thread, which includes a lot of speculation and/or information about original tracklistings (including some info from former Ledgie Mike Bise):
http://ledge.fleetwoodmac.net/showthread.php?t=43583
If and when BD, WD, and RAL are remastered, I hope the label involves Stevie at some level - I'd love to see what outtakes/demos have yet to see the light of day.