2nd time in Hawaii Kauai vs Big Island?

7 days might not be enough for two islands and activities IMHO.

I'd pick one island then concentrate on lodging and acvtivities.

I tend to agree with Kal. The Big Island is just that.....BIG and you can spend a lot of driving time getting around the island.

With adventurous teens, I'd go for the Big Island; and to reduced driving time, divide the 7 days between 2 locations. For your family, recommend look into condos.

I'd suggest only one island for 1 week. What do your adventurous children like to do? That would help to determine which island would be best.

Both islands have a lot to offer so I'm sure you can't go wrong on either but I do have tg say that Kauai is much more laid back than any of the other islands.

We did a split between the BI and Kauai on our last trip; I think we were gone 9 days, and we really had to pack everything in to see both islands. If you want to relax a little more, I'd pick one island. If you want to do both, you'll really be on the go. On the BI, we enjoyed the Volcano National Park. At that time, you were able to hike out at night and see the lava which was amazing. Things change daily, so not sure if you would be able to do that. The Kilauea Lodge was a nice place to stay close to the park. Good restaurant on site too. For beach time, we stayed at the Hapuna Beach Prince and really loved it, very pretty beach there. We drove around the island to see everything - Akaka Falls was amazing. Also snorkeled in Kealakekua Bay. On Kauai, our favorite thing was the helicopter tour of the Na Pali coast - an unforgettable memory. We also enjoyed a sunset sail with Captain Andy's, driving to the falls, and seeing the Spouting Horn. We loved both islands; it would be hard to choose one.

In March we (me, husband, my 2 kids & my parents)spent 5 days B.I. & 5 days Kauai and I would've like to have more time on each island. If I had 7 days I'd stay put on one island. Though I enjoyed both islands very much, I really want to go back to Kauai very soon and spend more time on the north side. We stayed in great condos on both islands.

A lot depends on what you want to do. I find the B.I. to get great, but not if you want beautiful, white sand beaches. (Although there are some in the Northern part of the island).

I love Kaui because there seems to be more diversity of the environment and things to do.

Where would u recommend staying in Kauai? Thanks for the info.

With the two adventuresome kids I'd suggest Princeville/Hanalei area.

You have golf, horseback riding, ziplines, Napali Coast hikes, kayacking, surfing and very nice places to stay.

They'd probably like hanging out in Hanalei

Kauai is my all-time favorite so I vote for it.
You will still find hiking, whale-watching (in season), fabulous Zodiac trips along the Napali coast and beautiful scenery reminiscent of an "Old Hawaii". The only thing Kauai doesn't have is the volcanoes.
Perhaps 7 days in Kauai with a helicopter tour to the volcanoes?? Or 6 days in Kauai then the last day go to the Big Island and depart for home from there. That will actually give TWO days there since most of the flights leave for the mainland in the evening.

Addendum to my just-posted message:
Stay in the Poipu area of Kauai. It is the sunny side of the island. Although Princeville is lovely, there's too much rain there for me!

We stayed at the Marriott near Lihue, only because we had points. We really preferred Poipu or the North Shore areas, and that's where I'd stay next time.

I love all the islands, but I found more to do on the BI. I have family on Maui and they feel the best snorkeling (and easiest for young ones)was on the BI. Swimming with the turtles (can't get too close though) was memorable. Get a direct oceanfront condo and it's exciting just to see the whales, fish, and dolphins from your own "home"! BI is more laid back (in my opinion) and the volcano area is a once in a lifetime experience. well, as you can tell--I'm partial and try to go over once a year.

We *love* Kauai (been there 5 times the past 5 years!) and all it has to offer; 1 week is our minimum stay there, and that always whizzes by. A couple of the trips we stayed a couple of nights in Waimea as a base for hiking in the canyon (would be awesome with your teens) and the balance of the trip on the north shore, our favorite (more rain, but worth it for the lush, tropical beauty). Even though the island's not *huge*, it can take 2 hours to drive from one end to the other, and that can be tiring if you're trying to do a full day of activities too.

We're taking our first trip in Feb. to the Big Island, and it will be for 8 nights. 6 nights at a private oceanfront home in Puako and 2 nights in Volcano.

Just my opinion, but unless you plan to never return, I think a travel experience is almost always richer (and usually less tiring) if you base yourself somewhere and really explore all the area has to offer rather than spreading yourself too thin. Just my 2 cents