The Swains 2023 operation (imminent) maintains a web site and has been sharing some useful information there for those hoping to work the operation. For instance, a link to this video on how to read VOACAP charts.

And this, OH6BG is well-known for his online VOACAP portal for daily propagation predictions. For the DXpedition to Swains he has made up a default DX propagation chart. With everything else pre-set, you only have to put your grid square and antenna in the designated boxes and the chart will show you the best bands and times to make it into their log.