Steve,
Doubtful that you'll get this prior to surgery but I wish you every luck possible and hope your vertebrae is salvagable. I understand your nerves being shot and that this is a larger worry than the ADR surgery itself but you know it has to be done and is no longer a choice. In this way, it's easier.
The immediate post op pain may be severe but is also short lived. Stay on the pain pump as long as needed and you'll do fine. I look forward to your post op posts
Sending you good, good, GOOD vibes, Dale