Whatever helps you to be accountable. For me writing it down meant I had an extra piece of paper to throw away when I changed my mind lol. Telling non-alcoholics about my plan meant I'd have more people to hide my relapse from. Telling active alcoholics was like talking to my AV in the physical form.
Once I disclosed to sober alcoholics about my plan to stop drinking, the jig was officially up! They knew all the signs of someone still drinking and saved me from myself long enough for me to get a glimpse of joy. That accountability was critical but no plan will stick without willingness.