Hi ronh and welcome to this forum .....
I do not remember seeing this question on the forum before. Hopefully someone on here has used a CPAP and can address your question with their own personal experience.
Presumably your doctor knows you use a CPAP, but if not I would certainly ask him your questions, as well.
My own, non-medical, opinion on the air pressure is that that part would not be a problem, but certainly ask your doctor. As for the straps, it would depend somewhat on which brand of mask you are using. Typically, you wake up from surgery with a significantly large pressure bandage on the surgical site (often wrapped around the entire head) ..... again, this can vary from surgeon to surgeon. The actual translab incision also varies somewhat. In my case, my scar is about 1 to 1 1/2 inches behind the ear in a curved fashion (about 3-4 inches long). Usually the pressure bandage is removed in 24 hours, but the surgical site remains very tender for most people for several weeks.
Just a thought ..... ask your sleep apnea doctor about alternate types of mask that could maybe avoid the incision site. Depending upon how long your incision is, the bottom edge of it could be under the strap.
Hope that helps. Clarice