My husband and I are taking my mom (75yo) and our 3 boys (5-10yr) to Arenal for 3 days at the start of our CR trip. We were looking at the Lost Iguana, Campo Silencio or Leaves & Lizards. Also, we heard hiring a driver to/from airport is a good idea. But then do we rent a car locally or just use tours(?) or taxis(?) for the 6 of us? Finally, we love wildlife but can't be too arduous with active but elderly mom and young kids. Any favorite activities to do in area? Thanks!