I agree that for visiting sites, it is better to rely on a taxi/tour guide (and Thenford Grey is one of the best!). Many, if not all, of the drivers are well-versed on the island history and will point out things you might miss on your own. Over the years, we have become good friends with one driver who takes care of special needs, e.g., helping me shop at the Saturday fruit & veg market where she could convert the local EC to US$ for me quickly and recognize if I was getting the correct change, the local bakery for sugar cakes, finding a pharmacist after hours for DH's insulin, taking us to the Lo-Los up in the hills for real Kittitian food. And we never got lost! Our experience of the island would have been quite different and far less interesting without her.