I have a couple of suggestions. First of all, take a couple of weeks off as vacation time. Plan it so that the first day off is the same day that you have surgery. This gives you maximum time to heal. Use graftcyte. It really reduces the redness and decreases scabbing.
If you are very bald, you might want to just be up front and tell your co-workers what you are planning. You may be surprised to find that it's not that big of a deal anymore. They will probably realize that you have had some work done anyway when the hair comes in and you look 10 years younger.
I wouldn't worry about shock loss. It does happen, but it's usually not that profound.