It was just notice - but the event was planned such a long time ago, that I can't imagine they had many bookings before they knew about the tournament. Since you can cancel with 14 days notice, everyone was given the opportunity to cancel without penalty as the warning was communicated to guests well in advance.

The only disruption was to golf - since I don't know of any comparable courses on the Big Island (or anywhere else in Hawai'i for that matter), I'm not sure what service recovery options would be offered to a guest coming for golf.