Essentially - Kauai was what I expected Hawaii to be. A beautiful tropical island, low key, full of waterfalls and a wide range of terrain
There are opportunities to fly directly to the island - or - fly through Honolulu and take a Hawaiian Airlines flight. It is quick, inexpensive and flexible.
There are various options though mostly AirBNB/ VRBO, etc. plus various resorts.
Kayak up a river, hike to waterfalls - so amazing
Biking along the Ocean - bike rentals
McBryde & Allerton Gardens (National Tropical Botanical Garden) - tour and dinner - this was a highlight of the trip
Didn't do: Tubing, Ziplining
Kauai Plantation Railway - great for kids - includes animal interaction
Lydgate Farms - Kauai Chocolate Farm Tours and Tastings
Didn't do: Old Sugar Mill of Koloa tour
Shopping - not your typical shops - Old Koloa