Going to the north shore to capture surfers would be a good target.
Pali drive lookout is also an epic place to fly, you can see both sides of the island from about 200' AGL, but sometimes it's too windy, be careful. Coordinates: 21.366956,-157.793177
Another good shoot is the
Ko Olina resort area, taking a shot of the hotels and beach, flying over the ocean sideways up the coast.
If you like movies, visit the
Kualoa Ranch on the northeast side, over 50 movies were made there, including the series Lost. It's a good tour, but I'm not sure if they would let you fly the area, you'd have to ask your tour guide.
There's usually turtles sleeping on the beach at
Halewa Ali i Park Beach on the north shore. However I don't suggest flying there, only stopping by after the you get surfer shots at
Banzai Pipeline.
You will definitely need a backpack for the craft. Remember, carry all of the LiPo batteries as carry-on when you fly to HI, but if you have the right size backpack you can take the craft as carry-on too.