Were the troll wigglers that Karkat created sent via meteors too? I'm confused as to how that'd work with the caves, since Vriska mentions remembering the trials.

It’s actually a bit difficult to tell, because some other Trolls do say their memory of the time is hazy at best, which could mean Vriska is just being a self-aggrandizing bitch by pretending to have gone through the struggle of the Trials. On the other hand, we know Acolytes of the Signless were waiting for Karkat and provided him with a Lusus that could raise him- If it was indirectly, by just having Crabdad around until the time came, they could’ve all just landed around Alternia at Random, but this, Vriska mentioning about the Trials, the fact Kanaya has a Virgin Mother Grub as her Lusus, it all seems to point out they all maybe ended up around the area of the Caverns and were just dragged in by the Jadebloods? Maybe Scratch ensured they wouldn’t get culled by warping them in there so they weren’t found out by grub poachers.