Precruise antigen testing for a Princess cruise at LAX

[Sprocket]

We are driving across the border 2 days before our cruise on April 30th.  Spending one night in Washington state before flying to LAX on the 29th.  We won't have a car and testing will be closed by the time we get down there and flying out too early the next morning so considering the antigen test at LAX.  Will Princess accept the test has anyone used it for cruising/

 

If I am understanding Canada's testing rules we could get a PCR test here on the 27th that gives us 72 hours before boarding the ship so if we book an appointment around 4PM  we should have our results back by midnight at the latest on the 28th before our flight.  I know the Switch tests are an option but hubby is really hard of hearing even with 2 hearing aids and I freely admit following direction is not our strong suit lol.

 

I am leaning toward getting the PCR locally just worried my math skills are lacking....