I suggested the OP post here to take advantage of more helpful feedback. We spend most of our time admiring Tortola’s beauty from just driving and from the water so didn’t have a lot to offer.

Manderlists you added your port times here and you are there early which is good if other ships are in port. I wonder if a private tour would be your best option? A driver with intimate knowledge could take you to some of these spots, or could even design the perfect itinerary for you prior up to your arrival.

With the latter in mind I would contact AC - but book early if you decide on this.

http://www.info-res.com/actaxibvi/

https://www.bvitourism.com/acs-taxi-service

"Travel changes you. As you move through this life and this world you change things slightly, you leave marks behind, however small. And in return, life — and travel — leaves marks on you.”
-Anthony Bourdain