You definitely need a torch and decent shoes but even the main chamber which is lit by daylight is amazing to view. Some of the steps and walkways needs a little TLC so watch out for missing steps and slippery bits but well worth the half day trip to visit Fairy and Wind Caves. The new stairs at the entrance make it easier to enter compared with the old stairs against the rock face.
Wind Cave is better maintained by Sarawak Forestry with some really good interp signage throughout (and also correct) and lots of animals to see, including several bat species, swiftlets, frogs, lizards and sometimes snakes.
On our way back our driver took us to the local market at Bau and also to see the blue lake there, which is left over form old gold mining in the area. A very interesting day all up.