I have just about finished coming up with my itinerary, but the more I read the more wonder if I will be missing out greatly if we don't go to Corcovado. What is different about it than the other areas that makes it the best place to visit? I was planning 2N Tortuguero, 3N Arenal, 3N Guanacaste, and 4N Jaco. We depart out of Liberia. If I included it how long would I need and what would I replace?