the warriors have always made their decisions re staying or not pretty early, primarily as I understand it due to players' family commitments etc. They also dont want to risk the quarantine at either end of the border screwing up the season. Think the owners have said that they'd base themselves in Aussie and maybe cross the border for home games if and when they can.
https://www.stuff.co.nz/sport/league/warriors/126332224/warriors-looking-to-play-six-nrl-games-in-auckland-next-year-while-based-in-redcliffe
https://www.stuff.co.nz/sport/league/warriors/126332224/warriors-looking-to-play-six-nrl-games-in-auckland-next-year-while-based-in-redcliffe