Shershko,
As you say, it will depend quite a bit on what you have done and how much native hair you have. Like you, I have a job where I can't wear a hat. I went back to work on day 10 after ht#1. I was able to keep almost enough hair to cover the scabs and redness. I got a few looks but each day the hair was a little longer and provided more camouflage. For ht #2 the docs shaved quite a bit and it was a harder sell when I went back to work. I think I was able to pass it off as a bad haircut. You can see my pics by clicking below.