I was in the same situation in the weeks leading up to my HT. I work in a brightly lit office and am very friendly with a lot of the other guys in the office. Too friendly perhaps as we constantly slag each other.
My main fear was how would I hide it from everyone and I was generally worried about the potential slagging I would get.
Well I’m 4 weeks post-op today and not one person has noticed that I did anything other than shave my head. When I look in the mirror I think it is obvious but to other people it is not.
I got it done on a Thursday, took the Friday off work, and worked from home the following week. Was back in the office on day 10 and it was fine.
I got 4550 grafts too so it was quite a lot.
Hope this helps ease your concerns!