Also, the weather in the Palawan region can be unpredictable like the rest of the Philippines during the monsoons and winters. Severe typhoons are a common occurrence in these regions because of which the national park gets closed to the visitors as the water level rises. Plus high tides also make it inaccessible. So if you specifically intend to visit Palawan for the underground river trip alone, keep in mind to check the weather.
Although there are hundreds of tour agents and hostels selling this tour, you can skip them all and do the tour on your own with a bit of planning. The challenge would be to get a transport, and there are taxi and bike options for that. If you could identify a right day and mode to reach there, you can go on your own, stand in the queue, get the permit and tickets.
Don't forget to get your audio guide for a small fee. It is worth listening if you want to know more about this place.
The place gets completely dark after a while, and you'll only be guided by your headlights. So for photography, be prepared to take the shots in night mode and be careful not to drop your mobiles in the river in the dark!
Other activities to do in and around the national park
Sabang region has also other attractions that you can combine with your visit to the Puerto Princesa Subterranean River National Park. Here are a few:
The Puerto Princesa Sabang X Zipline right next to Puerto Princesa Subterranean River National Park is a place to go for a quick adventure ride! A 10-15 minute hike amidst a Mangrove forest will take you to the 750-meter long zip line that'll take you above Sabang beach. At almost over 150 meters high, it is one of the awesome adventures that I recommend to everyone!
Palawan Wildlife Rescue & Conservation Centre
Crocodiles, crocodiles and more crocodiles - Believe me, I hadn't seen SO many crocodiles at once in life on the same day. From the remains of a mammoth crocodile that is the size of a big wall to tiny baby crocodiles in dozens, the Palawan Wildlife Rescue & Conservation Centre is home to hundreds of them of different species.
You'll learn a lot about their life including their habitat on a walking tour that they take you. In the end, you can also hold a baby crocodile to take photos, for free!