1. Bring a wider angle lens, haha! For Banaue and Sagada, I felt sorry I only have 24-105 mm lens. However, when I got to Bacolod ( my hometown), where I had the chance of photographing wildlife ( bats and butterflies), I was not sorry at all I didn't have with me my 11 mm lens. I was thankful I had my 24-105 mm lens. The 105 mm lens allowed me to zoom a little bit closer to bats! More about them in my later posts.
2. Waterproof my camera to allow me to swim in chest deep water.
3. Find a waterproof backpack for this kind of exploring.
4. Use headlamp so I can be more independent from the guides. Of course, I will not venture really farther away from them, but I would have more freedom to take pictures because I would have my own light. My limitations in taking pictures here was that, when I was ready to take pictures, I no longer had the light. :(
4. Avoid peak season. Pick a time where there are not a lot of people exploring the cave. This is really a very beautiful cave, just that we were not able to fully enjoy its awe and wonder because of too many people in the cave.