Here are a few thoughts:
As SeaSeaRider said, if you are at Cooper by two you should be fine. If not, given your planned itenery, I would keep moving up the channel to either a ball outside of yacht harbor (or on the dock if you have AC.) Trellis is another option. I actually like Trells or Marina Cay better than Cooper, except for the snorkeling at Cistern Point.
After the Baths in the early AM, you can then do the Dogs for snorkeling and lunch and spend the night in North Sound. Leverick would be my choice.
Day three, off to Anegada by 10 and then you will have plenty of time to go to the beaches.
From Anegada, I love the long sail to either Jost or CGB with a lunch stop at Monkey Point on Guana.