Yes, you'll need them for the water taxi and all testing/customs/immigration when you arrive at West End. Also in a taxi if you use one. Most drivers will ask you to hand sanitize on your way in and out of the vehicle.

Basically, you need to wear masks indoors at all businesses. Also required outside if you can't maintain a 6 ft. social distance. In bars/restaurants you wear your mask until you are seated. Some places may ask you to keep it on until a drink is placed on the table but this practice is disappearing. If you get up to walk to the bar or restroom, masks should be put back on. Also wear them to exit the restaurant.

When you are hanging outdoors, nobody expects you to wear a mask unless you are very close to someone outside your travel party. If you get up and walk to get a new painkiller from Leon at Soggy Dollar, you should wear a mask to the bar.

Every place will have hand sanitizer right outside or inside the door and expect you to use it.

Some stores have temperature machines at the entrance and generally you just scan your wrist and will get a green light.

Some restaurants will do a temperature check and collect contact information for contact tracing (very rare).

Let me know if you have more questions.