hi when we visit in September would we book the river ferry hop on hop off along with the bus ?

The ferry ride came as a bonus when we bought the tickets for the hop on hop off bus

The bus was a terrific way to see the sights. I am certain the ferry would only add to the experience. We didn't utilize the hop on hop of as we did the sunset/night tour. AKA no bus to hop back on to. Dress in layers. Its colder up top of the bus. We enjoyed the tour earlier in our stay. We then returned to areas of interest via subway and walking.

Hi. When i visited last month we booked the ferry, the bus and the 911 museum in one package to get a better price. I do think its fine to book just one of them. Hope I could help you.