The grassy, botanical-garden-surrounded tent sites at the base of the Koʻolau Range are cool and green, fed by frequent mists. With an overnight guard and gates that close, it’s among Oʻahu’s most petty-theft-free campgrounds. Reserve your permit for one of 15 campsites online. There are two other smaller campgrounds, Kahua Kuou and Kahua Lehua, nearby.