I'm looking into going on a birdwatching tour there mid next year.

Part of the tour involves a few days at the lodge at Volcan Arenal. It should be awesome. :) I always dream about volcanoes, and something about how they're the beginning and end of things just draws me to them. Curse living in the most seismically stable country on the planet! (although it is kinda nice to only have to worry about storms and bushfires).