You can do this thing Mike. You owe it to yourself. My advice is to read everything you can on this site. You will see that your "one vice" can and will still kill you.
Before my quit, I felt that exact same thing. I even tried to find research that chew by itself would give you cancer, destroy your mouth, etc., etc., etc. Guess what I found? Nothing. That research doesn't exist. It will do all those things even if dip is your only vice.
I'm a fellow Coper and I know what you mean by security blanket. However, having read everything I have on this site, I now know that it was less a security blanket and more a straight-jacket. Embrace your newfound freedom and don't worry about tomorrow or after your surgery yet. Take things one day at a time (ODAAT) and quit your ass off today and today only. Wake up tomorrow and repeat.
Drink the Kool-Aid my friend and I quit with you today. PM me if you need some more digits, I'd be happy to swap with you.
jz