Anyone proceeding past Hanakāpīʻai Valley (2 miles in) must possess a valid camping permit whether or not you plan to camp. Permits are required to camp at Hanakoa or Kalalau (Same permit). Permits are $20 per person per day. Good news if you are a resident, you get a $5 discount.
Violators of the permit policy may be cited, and those cited will be required to show up in court. Violation of this rule is a petty misdemeanor under Hawaiʻi law, and a conviction will result in a criminal record in addition to penalties.
Availability- The amount of people allowed on the trail at any one time is limited to a small number. Permits often sell out and during busy times of the year can sell out up to a year in advance. Get your permits early to ensure you will be able to visit Kalalau.
Online Reservation System- You can check for permit availability and purchase camping permits online. Visit the Hawaii Department of Land and Natural Resource Online Reservation System to reserve your permit.
Day-use reservations for those looking to hike the first 2-miles of the trail can be made at this link: https://dlnr.hawaii.gov/dsp/parks/kauai/haena-state-park/