Serious fisherman should bring it and even bait as we are sometimes limited. We do not have wells or treatment plants for water. It is rainwater that is caught on the roof and stored in a cistern below the house. Generally untreated though some people have filters or add minute quantities of chlorine. We suggest buying bottled water for the taste.
Bottled water is readily available in all stores.
Owners request no boat washing, clothes washing, wasteful practices to ensure that you do not run out causing an expensive water barge refill. Most beaches by villages do have an occasional beachcomber, family swimming, etc. So probably not a good idea to disrobe. However once you get in your boat and leave the populated areas there are hundreds of uninhabited cays with pristine beaches and no other people. No one will know or care whether you were with suit or suitless.