I'm thinking of hunting down a place that does the antibody test (aren't that many compared to the PCR testing places) because it would make it easier to do transits to and from the USVI. I had read somewhere that older folks (I'm 66) weren't generating as strong an antibody response to the vaccination (I had Pfizer) so thought that might result in a negative antibody test.

Still for the obvious travel benefits it's worth pursuing.