Hawaii, opening up to tourism with testing may not be the best idea.
Islands like Aruba, French Polynesia, and Iceland had seen terrific control of COVID until tourists, fully tested tourists, arrived and then COVID rates exploded.

Aruba opened to tourism in July 1. All tourists were tested immediately before or after arrival. By August, Aruba saw the highest rate per capita in the world. https://www.travelpulse.com/news/destinations/aruba-to-reopen-for-us-travelers-in-july.html

French Polynesia opened to tourism July 15th. All visitors over the age of 6 had to have negative PCR testing. COVID cases stayed low until they didn't. Cases shot up over the last month and now French Polynesia has the highest per capita COVID rate in the world.

Iceland was the COVID control exemplar. Tourists from EU/Schengen + 'safe' countries could visit w/testing or quarantine (or mix of both). A strain likely from tourists spread and now travelers from Iceland must quarantine. https://www.schengenvisainfo.com/news/iceland-to-lift-entry-restrictions-for-residents-of-15-third-countries/ https://www.icelandreview.com/ask-ir/whats-the-status-of-covid-19-in-iceland/

The test-and-then-consider-safe policy works until it doesn't. When it doesn't work, it's a set up for superspreading, as the world saw after the White House began reporting cases.

Test-then-consider-safe policies work until they don't. When they don't, they fail spectacularly

They select for superspreaders

Viral shedding goes from 0 to full throttle fast.
The most dangerous spreader is the person who just turned positive and was negative hours ago.

Most who test negative won't be on the cusp of explosive viral shedding, but sometimes there's that person who tests negative will be on that cusp. The time between a negative test and a positive test may be the duration of a long haul flight or a short holiday break.

Those who know they have COVID often aren't as infectious. If symptoms prompted testing, they likely had the illness for days before being tested as early symptoms are very mild. They may ahve waited days for results. Shedding drops off quickly and by day 10 most arent infectious

Most testing negative wont be on the cusp of explosive viral shedding, but sometimes there's that person on that cusp. The time between a negative test and a positive test can be the time between take off and landing on a long haul flight or arrival and departure on a short break