It is generally advisable to book in advance if you plan to visit Taman Negara National Park, especially during peak season (June to August and December to January), as it can get quite busy. This will ensure that you have a spot on the activities you want to do, and it also helps to avoid disappointment and ensure you get the most out of your trip.
Some activities, such as the canopy walk and wildlife tours, have limited capacity, so booking in advance is best to secure your spot. Additionally, suppose you plan to stay overnight in the park. In that case, it is recommended to make a reservation for accommodations, as the availability of rooms can be limited, especially during peak season.
You can make reservations through the Hotels official website or book through a tour operator. Just be sure to confirm your booking before your visit and bring your confirmation with you.