Tourists mainly get around by taxi or tour operators. However for the tourist on an economy budget the bus service is acceptable, but slow. Unfortunately the nicest spots are only reached by your own transport. But if you stay a week or more, rates for rental cars become quite reasonablesee below.
To/From Barbuda: The Barbuda Express offers ferries from Antigua (http://www.antiguaferries.com/).
Car RentalThe cheapest car rental you can find is Tropical Car Rentals Antigua: Tropical RentalsTel: +1 268 562-5180, Fax: +1 268 562-5181, email@example.com. Their cars are in top condition and their prices are way lower than others on the island. They pick you up at the airport and wait for you at your departure, thus avoiding any unnecessary additional taxi rides or such.