@TheresaS, yes, I just had a massive knee surgery on May 21st and I swear that everyone asked about my CPAP. The more impressive thing, IMO, is that the medical staff noticed sleep apnea in my electronic medical record and raised the issue without me having to say a word!
I had my sleep apnea confirmed and was told to bring/asked whether I brought my CPAP during my pre-op phone call, pre-anesthesia appointment, scheduling consultation, arrival for surgery, anesthesia prep, and probably people after that I don't remember!
My CPAP traveled with me into Post-Op, but wasn't assembled until I was settled in my room later in the evening. The only suggestion I have is that you have a quick start guide or other brief setup instructions with the equipment since the respiratory therapist might be unfamiliar with your equipment.
If only my knee surgery were as straightforward! UGH!