Coorg is in the State of Karnataka which is a hill station and is famous for coffee estate and not sanctuary. Dubare Elephant Camp is one such sanctuary in Coorg which I did not liked much as there is nothing much to see except majority of few elephants.
And few birds during my visit to this place in the year 2013 with my husband. It is mainly elephant specific sanctuary because of its historic culture as most of the houses used to have elephants for kingdom of ancient times.
It will take just few hours to explore the entire sanctuary which I do not think would be of much interesting because you will not be able to explore much except elephants and few birds. Rather I would suggest exploring the entire natural beauty of the place with coffee plantation and enjoying coffee at some good hotel and resort and have fun with your family. It is just an average wildlife sanctuary of not much to explore.