I think, basically, the key is to be aware - be aware of the situations you're putting yourself into, and make plans beforehand.
Members of my family laughed at me too - but I didn't really expect them to understand.
The important thing is
we understand,
we know what drinking does to us and what not drinking means to us, and
thats whats important.
Don't give up now. You drank, but you can stop it there
However many more days vacation you have, make them sober ones...do whatever you have to do.
Maybe going to an AA meeting will help others see you're serious?
D