i didn't give up booze when ttc - as you say you could end up putting your life on hold and making TTC the whole focus of your life which might just stress you out even more. I think if you are sensible about the amount you drink you'll be ok - obviously tequila slammers every night of the week are out but "social drinking" is probably ok.
think of the millions of healthy babies conceived in a haze of alcohol every year.
take it easy but enjoy yourself. Give up smoking though if you havne't already.
best of luck with ttc too.