What is the ferry ride like on the St. John on Your Own Tour (STT-295) from a Princess ship docked in Havensight?   Is it a very rough ride?  Are restrooms available?  Where do you board the ferry?   I've seen other threads mention that you have take a taxi to Red Hook to get to the ferry.  But, the Princess website doesn't mention that.  The description just says board the ferry - without mentioning anything about getting to Red Hook.     Thanks in advance