Permit-limited expeditions: a survival guide

Most operator software treats capacity as one number per trip. If you run permit-limited expeditions, that's not your reality. You have a guest cap, a total-people-in-the-field cap, and sometimes a third operational cap (boat licensed for X, hut bookings for Y).

Three caps, not one

Model them all. The operator who lets a fourth host slip into the field on a 6-cap permit is the operator who loses the permit next year.

Atomicity matters more than you think

Two guests apply for the last seat at the same time. Your booking system needs to pick one and politely turn the other away — not record both and let you find out at the boat ramp.

Track the permit itself

Permits expire. Permits get reissued at different limits. Keep them as first-class records (label, limit, expiry, source) so the trip's capacity cap can reference them — and a renewal coming up surfaces in your dashboard.

Write the policy into the public page

Tell guests up front. 'This trip is licensed for 6 people in the water. That's not us being precious — it's the law of the marine sanctuary.' Guests who get it become the right kind of guest.