Hi AZWILDCATS - When I had my screws removed, they used a topical "numbing" ointment on the screw sites to kind of "numb" the area (like novacain ) They used these long q-tips to apply them for a few minutes - I didn't have any local/general anesthetic (ie: needles). It took the edge off of the pain, and I hope that I don't scare you, but I found that some of the screws were quite painful when they took them out (with a screwdriver). So please tell them if you need a break, or if you need more novacain.
After that, 2 advils later, all was fine!! I could have gone back to work right after, but luckily I had the rest of the day off, but was back the next day.
I am not sure what anesthesia your surgeon is going to use, but I don't think that it is necessary to go under for this procedure.
Best of Luck & I'm sorry to hear that you are still experiencing sore gums - hopefully that will go away once those darn bands and screws are taken out

I'm sure the freedom of moving your jaws will be worth it!!