Hello CK and welcome to one of the most supportive group of folks on the net!
I am Bald By Choice so I can't give you first hand advice as to your issues. There are, however, several guys on the board who have had transplants and even one who has used SMP to camouflage the scars.
But, my two cents worth are:
1. Most of us are more self conscious of the bumps and scars on our scalps than anyone else can possibly be. The rest of the world simply doesn't care enough about us to be staring at our minor imperfections!
2. I have seen many Before and After photos of people who have used SMP to cammoflage their transplant scars and it really, really looks good! They are not covering a vast bald area with artificial spots, they are only blending the small bald areas of the scars into the surrounding natural hair.
3. What does NOT look good, IMHO is people who use SMP to cover the full area of hair loss. The tattooed hairline ALWAYS looks contrived and is far more noticeable than the natural baldness. Then too, as you age, the tattooed "hair" will retain its color while your remaining head hair turns gray. So, if it were me, I would definitely consider SMP but only to cammoflage the scars.