On the advice of a local at the guesthouse where we were staying we took the evening river cruise to see the fireflies. This is a great option as you get to see the sunset too as you head out. Captain Chim is a man of few words but incredibly friendly and a man of great action. At one point unbeknownst to us as we were watching the sunset he jumped into the river and disappeared to emerge a few seconds later from underneath the boat where he had gone to check on the water pump...legend! Luckily he informed us there were no crocodiles. Good to know! At $6 this is a steal plus you get a free beer or soft drink. The atmosphere as the sun goes down and the peacefulness of being out on the river at night is quite something. Reliable and certainly with doing.