I've been there exactly one time but this is what we did. We took one of the trolley tours. The guide was very informative on the trip around the city. The trolley tour was supposed to be one of those hop off/hop on affairs with different stops around the city. What we learned quickly was that it was easy to hop off, not so easy to get back on as the trolley was always full. We were there on a cruise and there was at least one other ship there at the same time. So I would say if there is a cruise ship at the dock, and you do a trolley tour, plan to do the whole loop. Then when you get back to the start you can go back to the locations you want to see more of.