Took another day trip to Block Island this summer, and again it did not disappoint. Luckily the weather this year was a bit weather, but we kept a similar itinerary. My recommendation is to take a ferry over to the island, and immediately rent mopeds for three hours to checkout the whole island (if staying overnight I recommend bikes as it is a small island, though it will take longer). Make sure to check out the Oar restaurant (where we get a quick bite and some drinks), and the cliffs as well as the lighthouse, and then come back into town for lunch, the beach, and the bars. Finish your night behind the National Hotel with a night cap by the fire pits before catching your ferry back.