Not truly story-related, but I don't see most people avoiding it if they're trying for the Platinum. The Aquatos have pursued Razputin all the way to the Motherlobe, and while they're not permitted directly on the premises, they are allowed residence within the Questionable Area, which acts as a tourist trap. The Aquatos camp can be found by following the campground sign markers, where you can talk to Mirtala, Nona, and Raz's mother Donatella.