We are going to Costa Rica for our first time the first week of January. We are staying at Casa Conde Del Mar. We would like to do some day trips (2-3) involving wildlife, nature, swimming and hiking, but are overwhelmed by the options available. Any recommendations for outings and tour companies are greatly appreciated. We are considering Arenal or Monteverde, any insight into which one to pick would be great too. Should we book in advance, knowing that it is a busy time of year to go?