Because harvesting of swallow bird nest is big time in Bengkalis, be prepared for the noise from the swallow birds during the daytime all the way to early evening. The whole town can be filled with swallows flying in the sky above.
One of the biggest problem in Bengkalis is the lack of fresh water supply especially during the dry season. Some places still use underground water, and there is a smell in the water which you may not get used to. For drinking, please buy bottled mineral water for safety reason. Another problem is that Bengkalis is a simple town with simple life, so do not expect much luxury here, including the hotels. The reward is that you will experience the true rural Indonesian lifestyle. Lastly, most locals do not speak or understand English, so an Indonesian speak friend or guide will be very useful.