Enjoy Bachelorette party or Stay sober till it's over?

My fiancé and I want children right away and our wedding is in 27 days. I got off BC this cycle and we are officially trying. My bridesmaid's are throwing me a Bachelorette party this weekend but my AF is due a few days after the party. I've been super strict about what I've put into my body and stopped having any alcohol all together. I'm tore between just not drinking and pretending I am at the party. (We don't want everyone to know we are trying) or just having a FEW and enjoying the night out. Having a baby is way more important to me than drinking but does that mean I need to put my life on hold every month for two weeks.?!?! Any advice ladies?