hi Fodors!

We (our family of 4 plus another family of 4, all children aged 6-10) have a week booked in Kauai during Spring Break next year (24th-31st March) and considering it's cyber monday tomorrow, I was wondering if anyone had any tips for things we need to see and do and that might require advance booking? Have no idea what, just thinking about it - otherwise just all your Kauai tips would be amazing!

To me, the whole point of a vacation in Hawaii is NOT planning/pre-booking. Regardless, I'm not sure there's anything to do on Kauai that would require pre-booking at all.

My favorite things to do on Kauai

Viewing the canyon - free
Hiking - free
Sitting on the beach - free
Surf lessons - not free, but sign up when you're ready to jump on a board
Poking around Hanalei - free

That's about it.

I can't think of anything it would be worthwhile to pre-book.

You may want to take a cruise along the Napili Coast, but there are plenty of boats and you can book just a couple of days in advance.

And we love taking the tours of the Allerton Gardens, but there is no need to pre-book, a day or two in advance is fine.

I agree with sf7307, you want to relax on Kauai and not have your schedule full before you arrive.

I've never pre booked anything including a Na Pali boat tour (going out of the west shore that time of year) and helicopter, but I visit in the fall, not during high season.
I might prebook the boat tour in case they have to cancel due to weather and reschedule, especially with that many people. Otherwise just book your car and hotel or condos.

Besides a helicopter (or plane) and NaPali Coast tour, if you're planning to attend a luau, you might want to pre book that.

awesome, exactly the response I was hoping to hear! Thanks all