Hi Rupert
Welcome
To be honest, I never was able to be around heavy drinkers and not drink...to stay sober I had to stop hanging around a certain group of folks...
Obviously, you're not me, and it's not impossible - after 3 years I believe I can go anywhere now and stay true to myself - but I think you may be in for a big challenge this weekend.
I wouldn't have gone this early in my sobriety.
For the longer term, have you considered anything else besides SR, like a recovery group like AA or SMART or something?
D