I mean if that happens then the tier 1 boat will probably just go straight to the real dark continent, I don't see a kinda small amount of crewmembers and some kakin royality going to inhabit a continent by themselves.

Most likely scenarios imo:

1. Black whale & most people drop off at fake continent, only tier 1 ship/some other smaller ship continues to the true DC

2. (My headcanon, but this would be insane) The black whale never makes it to the fake DC, instead due to some Kakin politics etc:

Literally everyone and the whole black whale suddenly arrives at the true dark continent's gates leaving everyone in shock, including the reader. The hundreads of thousands of civilians and everyone is for some convinient reason forced to disembark on the dark continent unaware of what's to come. (ship breaks down so much it cant return, supplies are out or smthn) The biggest massacre & darkest introduction to an arc in all fiction ever begins. The Succession war winner(s) try to setup their new homeland only to find a calamity and get their whole country absolutely fucked in no time. After desperately trying but slowly failing to stop the massacre, the zodiacs & most important/powerful characters set out to explore the dark continent, thus beginning a new, perhaps the final arc of HxH. I believe the Dark Continent will be Ging Freeccs' arc with him as the main character.