I am traveling to Costa Rica in about 4 weeks. We are going to Arenal Observatory Lodge and then to Dominical where we are renting a house. We are outdoors people, so I envision that we will walk somewhat into the forest. Nearby our rental is a waterfall to hike to, where we can swim. My concern is poisonous reptiles, ants, spiders, etc. Is there a hospital near Dominical? Should we bring an antivenom with us? Is there anything else we should bring for safety? My husband and friend will probably venture a little further than the women. I hate to be a scardeycat but I just want us to be prepared. Also, in the Dominical area, do we have to worry about alligators, or Crocs?