We sailed with NG/Lindblad to the Galapagos in January. You are correct, we unfortunately did not find out which islands we would be sailing to until we boarded the ship. It seems they use two itineraries and alternate each sailing. I pretty much was able to figure out where we would visit, but wouldn't it be nice if they shared that information with their guests? We saw plenty of blue footed, red-footed and Nazca boobies, but we did not get to see their mating dance.