Best of luck with all your problems. I can relate, as I also have many spine problems. I have severe stenosis in my lower back and mid back, arthritis, bone spurs, scoliosis, a few discs that are completely degenerated to where there is nothing but bone on bone, etc.
Having worked in xray for many years, and working in O.R. a lot of them, I have seen hundreds of back surgeries. Not sure what they plan on doing with you, but I would be wary of procedures using cadaver bone and surgeons doing older methods where there is no hardware involved.
Most of the successful ones I saw involved the use of hardware (cages, screws and plates). The ones I have seen have the most problems were the ones they simply wedge a piece of bone in between the vertebrae and let it fuse......especially those involving cadaver bone wedges.
I've had a couple of friends have back and neck surgeries in the recent past, and they have had horrible results. They both went to a surgeon I suggested against. And they both had the old type of bone wedge with no hardware, using cadaver bone. Both people are now on disability and highly addicted to pain meds like oxycontin. Multiple surgeries and or other treatments such as stimulators and pain pumps, that were unsuccessful.
Ask lots of questions and do some online research on your own. If you can, ask O.R. employees such as nurses and O.R. techs who they would see if they needed surgery. I can tell you when I worked in O.R. I knew who to see and who not to see, and would tell anyone I knew that needed to see a surgeon.
On your waking up with numbness, you might want to reposition yourself. Sounds like you are sleeping in a position that is causing the most stress on your neck, and the numbness when you wake up. It could be as simple as laying on the opposite side, if you sleep on your side. It could be your pillow.
Best of luck, and keep us updated on your progress.