Hugs,
You will be doing your dad a big favor if he agrees to go along with it. Dr. Bob, one of the co-founders of AA, was a proctologist. His last drink was a beer that Bill W. gave him right before he had to perform some, um, delicate surgery. It was to keep his hands from shaking.
Think his patients were glad he got sober?
Good luck with this, will be interested to hear how it goes.