Bonsy,
My derm RX'd me 28 days 2X daily. I too had put in for time off but found that although unsightly I did not miss any work time at all.
I work Parent Education at a hospital so I do have contact with patients daily (some did look at me rather horrified) but I would explain to them that I was undergoing treatment for SCC to ease their mind.
If you don't see many people other than your co-workers a work you should be fine, I'm sure they will understand what you are going through.
It has been one week post-treatment. My face is healing quite well, the skin pink and radiant a few more sores to heal but I am so glad I did this rather than opting for a permanent scar.
You will do well. If you have any questions just ask.
Happy Holidays,
Michelle