We recently had a wonderful visit to Villa Los Aires with family (5 adults) and 3 kids under the age of 10. Although the location was remote, it was definitely part of the draw and we were lucky to get to see lots of wildlife in the "yard" as well as enjoy the hiking and waterfalls. Our best wildlife spotting of the entire trip was the morning that Pablo, our host was giving us a tour of the property's waterfalls. Just as we were leaving the house, he spotted a sloth climbing down one of the trees in the front yard. We were all in awe and enjoyed spending 10 or so minutes watching the sloth climb about 10 feet. :)
Most days we left in the morning around 8am to do activities and returned by 4pm (around the the time the rain starting falling). Despite the rain, we would come home to enjoy the pool and relaxation on the patio while catching up on email (the wireless worked great). We very much enjoyed our nights in (as the drive in the rain and dark on the steep roads was not appealing) and were excited to taste the local cuisine that the staff prepared for us nightly.
There were definitely interesting creatures that would come out at night, and we all got a kick out of inspecting each one, the kids especially. Luckily, the doors to the bedrooms were kept closed at all times, so most of the creatures (grasshoppers, spiders, beetles, giant moths, frogs and lizards) were limited to the open areas (lizards were often found behind the closed doors).
All in all, a great vacation with wonderful accommodation.