No, US citizens do not need a visa but you do need to do an online customs form found at the website listed. This can be done up to 3 months prior. The cost is $17. https://www.knatravelform.kn/en
Eastern Caribbean dollar is the local currency, but US dollar is accepted island wide, but know you will likely get change in EC. Taxis do give rates in US and majority are cash only.
No, there are plenty of other hotel options in many price ranges and if you let us know we will do our best to accommodate transportation to wedding events
There will be transport provided for the scheduled events as well as scheduled airport pickup/drop offs when arranged with bride and groom. Let us know if you have transport needs and we can give you reliable driver contact.
We appreciate your presence to celebrate with us but if you wish you give a gift we ask you take a look at our registry. Though there aren’t many material items we greatly appreciate monetary gifts to help us in this new adventure.