This is going to be a massive test DoinThis - but if you're committed to going I really hope you'll read this link - it's for Thanksgiving but it'd work for weddings too - there are some helpful ideas there:
Crying Out Now: Thanksgiving Survival Guide
It's probably not going to be a pleasant experience, DoinThis - I can't lie to you.
but if I, after all the years I drunk, can deal with grief and be ok with just being with the feeling...and if I can go to weddings and stay sober you can too
D