After thinking on it today I am leaning heavily on declining the trip. I have been doing well moving on with my life. I can fill the weekend doing me stuff.
I will make a plan to take S to the beach on my own. Probably the weekend she decides to move out. Whenever that will be.
I don't want to be here then, and I don't want him to be here either. So an overnite trip sounds like a great idea.