Permits and the turnaround
We apply for every permit ourselves: forest reserve entry through the Perak State Forestry Department, Taman Negara through PERHILITAN, and Kinabalu through Sabah Parks.

Weather
Thunderstorms build most afternoons. Trips start early, and cave trips are cancelled outright if heavy rain is forecast upstream.
Communication
Each group carries a satellite messenger. Someone in Ipoh knows the route and the time we expect to be out.
First aid
Both guides are trained and the kit is checked before every trip, including a splint and an emergency shelter.