Thanks to both of you, Jennifer and velotrain,
If the Adirondack gets in at 3:00, and the ferry leaves at 4:10, that is no time at all to wait, especially since the train will be late for sure. The only problem would be if it were so late that I would miss the ferry and have to wait several hours for the next one.
Is Burlington worth it, anyway? It sounds like it has a nice touristy upscale trendy downtown waterfront, with nice restaurants and that pedestrian mall. Or is it seedy for the most part, with just a small nice area, and they have a good PR department?
But I only want to go if it is worth it to do all that train/ferry stuff to get there.