Going to cruise the Galapagos with my wife in September and looking at an 8 days cruise on smaller boat, Nemo II,Mellennium or Seman II. How much 'spare' time do you get on an island. Is there enough time to rent a bike on San Cristobal? or hike the Sierra Negra Volcano? Expore some of the lava tubes during the day or is the schedule fairly ridgid?
My US travel agent wasn't to clear with answers. Is there a local agent you can recommend?