First, you’ll need to get a wilderness permit/camping permit from the parks office located in Lihue. You can’t get the permit via on-line nor via mail. You must show up in person. This should be done the day before your hike, because you’ll need to start at the head of the trail early in the morning if you want to get to the end of the 11 miles by 3 or 4PM while there’s good light to see by.

I think there are two places where you can camp for the night along the trail. There might be restroom facilities but no potable water. Take water purification tablets or filter. Plan your hike at the Kalalau Trail very carefully. I suggest that you buy a Kauai guidebook to do this. “Ultimate Kauai:Kauai Revealed” has great hiking trail info, along with color maps.

Arriving or departing from Haena (or at the visitor parking lot at Ke’e Beach), you can just put up your thumbs and hitchhike. It’s free and relatively safe. (I always pick up hitchhikers while in Kauai.) This is the best spontaneous thing a visitor can do safely in Kauai.

If you ever reach the end of the trail, there are some people at
the beach lighting campfires, bonfires, etc., at night. You can
meet some very interesting hippie people by simply walking up to them and offering food. Pizza toppings are good, like pepperoni, mozzerella cheese, canned food, etc. Good times, good times…
Hope you will enjoyed there lot….