Please also give some thought to the first few days of notdrinking.They can be pretty horrendous,physically and mentally. I struggled to leave thehouse on day 3,no way could I have ,managed a 9 day hike. What if you are ill, willyou be able to get medical assistance, alochol withdrawal is no joke.
Maybe look at quitting before your hike where you are close to home and medical care,if needed.