Edit: I am back from the trip, so what follows is to help anyone planning a trip as I don't need anymore advice. Starting with reply #76 (page 6 if you are using forum standards) I am sharing some of the shots I got there. I am also posting them to an set on my Flickr, Hawaii 2013. Thanks for reading and below is the original post.
So I've been searching and reading and I still find myself making another "what lens" thread. I just found out we are going to be going to Hawaii next spring, maybe April/May. We are waiting to find out details for available dates on the time share we are going to be using. We are looking at 1 week in Kauai, maybe 5 days on the Big Island and then a day or 2 on Oahu (I want to see Pearl Harbor, the wife doesn't care about it.) There will be 4-6 adults in our party and we will have our 3 daughters, ages 4, 2 and at that time the new one will be 3-4 months old. Hence why we have more adults going.
I have a 5D2, 24-105, 70-200 f4IS, 35L, 85 f/1.8 and 135L. I think zooms are key for travel, so I'll be bringing the 24-105 for sure. On the 70-200, I'll bring what I have, or if the opportunity arrises, upgrade it to the 2.8II. As much as I can see uses for longer FL's there, I just don't need anything longer than 200 here. Maybe I'll rent one there for a few days. I'm also 90% sure I'll be trying to get a 17-40 (which ironically is in my Amazon deals today for $740) I'm undecided on taking a prime. It would be my 35L (or a 50mm which I've been considering swapping it for) or my 85. I feel pretty good about those plans, but I'm open to suggestions.
What I feel I need more help on is filters. I see lots of mention of ND and GND filters. I already have good quality CPL's for 67mm, 72mm and 77mm (covering all but my 85 f/1.8 and a 50 f/1.4 if I end up with one.) Should I just get some decent quality ND filters in, say, 77mm? Or should I get the Lee kit so I can just get 1 set of filters and use them on other lenses. As I see it though, I can't use hoods if I go that route. Is that true? I guess I need to go read more about these types of filters.
Thanks for any tips.