First congrats on not drinking. I have not been in a bar since I quit and since that is the only place that I did my drinking I have not had the desire to pick up.
Like you I know if I have the first one it is all over so be strong.
It is definitely a good idea to avoid the bars until you get stronger. Some people would say to avoid them forever.
Keep at it. You have been through a lot of hard things sober and you are doing real well.