I don't have any words of wisdom, but I do wish to encourage you on your endeavors. Sounds like a good plan. Earlier this year I was at a family event with cousin I haven't spent a lot of time with since we were kids. I was in my cousin's just chatting and catching up with everyone and when it came time to leave I realized four hours had gone by and I hadn't once thought about a smoke. I stuck with water, but take a deep breath and go for it....
Good Luck and let us know how it goes....