You need to do what you need to do to protect your Sobreity at all costs!!
My family on my dad's side sounds like yours, and for a long time I avoided them, my aunts/uncles spend too much time drinking, always in the pub etc, so I stayed away until I could be a non drinker around them and be strong enough to make it happen.
Hang in there Jane!! 8 days is fantastic, and not worth compromising for anything or anyone!!