babygirl, good luck with your surgery. I know how stressful that can be. Hugs.
One more thing to think about is confidentiality. The Elder who is in charge of the bloodless unit has ZERO right to know anything about your medical history or anything about what you are having done. ZERO. I can't stress that enough. They are blood free but blood thristy if that makes sense. They want to know the tinest detail to use against you. Don't let the bastards into your life.
You need to seriously think about the forms you fill out when you get to the hospital. You will be asked to put down someone who will be called in an emergency, who will be next of kin, who will be the person who will make a decision if you can't, etc. You have to decide who you want to make these decisions for you. They could be life and death. You know that.
Do you want your Mom and Dad to? Or, is there someone else you feel you can trust with your life? That is what it comes down to.
Your parents will follow the C-U-L-T.
Your friend, boyfriend, sister, etc., will do what you have agreed to, if you feel you can trust them.
I haven't put my Mom down on a list as a person to call in decades. I know she would say "No blood." I know I would die. I can't trust her with my life. That is the sad reality.
Again, best wishes on your surgery and with your recovery. I am sure it will go well and you'll be fine.