Each tour session runs for around two hours with a brief description of the sanctuary and wildlife given before the tour.
Ash says participants should wear good hiking boots or gumboots as the ground can get quite wet and sludgy if it has been raining.
"We also recommend they bring torches or a head torch but we do have some available for those who don't own one."
Tickets cost $10 per adult and $5 for children aged one to 18 with all proceeds going to the Rotokare Scenic Reserve Trust.
■ There are six times available from July 15 to September 25. For more information, or to sign up for one of the times, visit the Rotokare Scenic Reserve Trust Facebook page.