In Bali I wouldnt bother, but if your heading to other remote islands I'd take precautions.
At a certain place near a creek on a certain island


there was 16 of us camping near the beach. There was a drunken nights party one night due to a week of no swell. Every other night everyone went through the ritual at dusk of long pants,shirt,repelant and mosquito coils burning around the tents, but on this night everyone got too drunk to care.
Everyone had their shirts off, in the morning people were past out on the beach in just boardies.
I know that 7 of the 16 got malaria, most probly from that night.
If you have seen someone who has been hit hard by it, you will be very cautious.
You dont need to be terrified of it, just take the time to cover up a bit and you'll be fine.
I got Ross River fever really bad a few years ago and thought I was going to die.