Hi Nikka:
Good job for coming here and talking it out. You are preparing yourself and I think that you can do it. Definitely have a plan of action and an exit strategy if things are getting too crazy or if it's getting too late.
Be careful recognizing the AV. I commented on your post about wanting a drink a bit ago so just be vigilant and remember that thoughts are just thoughts. Acknowledge and dismiss them. I am so glad that you are posting and working your plan. I think offering to drive is a great idea.
A Bach party with close friends sounds lovely. You are going to be SO present and have no regrets!
Keep posting. You are doing great!