Now is always the best time
The max number of obligated participants at any wedding is like four, including officiating and witnessing. That said, the AV is the only thing that claims such an event is special and unique enough to produce some kind of magical power that causes drunkness. Attending with the conscious idea that you are depriving yourself and missing out doesn't sound enjoyable, but going and not drinking is certainly doable. Nothing wrong with leaving early rather than later. And nothing wrong with developing a 'dead battery/ car trouble/sudden onset flu' , you only Have to be obligated yourself and your better interests.
Wish you well and hope to see you around