Response from Anthony:
we had several weeks of heavy rain and that tends to increase the bugs. We normally don't have gnats at all and our mosquitos only leave a bite that last 30 minutes and disapear. Our rooms are screened in with additional nets over the beds. As far as spiders go, hawaii is very safe. We do have the scary looking cane spider, but it is considered not a threat to humans and this is what (website hidden) says; Cane Spiders will often find their way into houses. While nobody wants to be startled by the sudden appearance of one of these hairy beasts, they are beneficial in the home and it is not recommended to kill the spider (either let it out or let it live in the home). This is what I did when Laurel called the first night of her stay, caught and released it outside.
We don't use poisons and everywhere in the tropics has insects, you should be concerned if you don't see insects, because it's a sign of poisons being used that are a "very real danger to you".
We want people to be in nature and who appreciate nature. Staying in a treehouse is just that, "staying in a tree", and is a wonderful experience if you are not afraid to be around safe insects. Otherwise, look to one of our other spaces that are more sheltered.