I have the same situation since I will ctb in a bedroom at my family home.
My plan is to do this when my family is asleep or they are away from the home for some time.
I know it will be traumatic for them to find me, esp for my mother. Shes the only one I dont want to hurt. Shes done nothing but been supportive in my entire life.
Everyone else in my life though, I want it to make them think about what I have done. For some, I want it to hurt them.
I thought about sending a delayed text message to someone I know, that in turn can get in contact with authorities etc...before my family is aware.
Im not sure though if this would work or not.
Another thought was that I would print out a message to post on the bedroom door that warns them about what has happened to me.
Telling them to call 911 and to not open the door. But I know they won't do that and would open the door anyway.
This guilt of how it will affect my family is the final piece of emotional dilemma that I will deal with in my life.
I feel horrible in what this will do to them. I guess my only recourse, is that they are elderly now which is better than if I did ctb 20 years ago.