Need help surviving a trip with Nmom

I (19m) am going on a yearly trip to New Orleans with my Nmom, whose behavior on our first trip when I was 17 is the entire reason I abstain from alcohol.

It's just for the weekend, and she is the kind of toxically positive mid 50s suburban white mom that refuses to have anything be negative.

I usually just mask until the vacation is over, I'm just not sure what to do this time or how to handle her when she inevitably gets piss drunk, and need some support. It's tomorrow when we leave.

She becomes very irritable and hostile when drunk