I am going to Kauai in a couple weeks and plan to take one of those helicopter sightseeing tours. Does anyone have any tips on what lenses work best for this or any other useful hints? Thanks!
I've never done the helicopter tour, but from what I hear, it's best if you're smaller in size and weight. For weight distribution reasons, the largest individuals have to sit in the middle, taking away the coveted window seat. I know you didn't ask this question, but it's good to know IMHO. That said, I imagine a 70-200mm f/2.8 would probably be good. With the vibration of the rotors, you are going to want a fast shutter speed. I would bring along a wide angle lens too, because the Na Pali coast has some beautiful vistas. As long as your glass is fairly fast, you should be fine.
One added bonus is that just this week O'ahu and Kaua'i received significant rainfall. Barring any scorching weather, the waterfalls should be running strong when you arrive. Don't forget to check out Waimea Canyon while you're there. Please share your images here when you get back!