One thing I learned, discussing the plot holes in regards to the lore and just simply "why aren't they noticing certain things", is that Larian... hasn't really given the details much thought in terms of "is this realistic". Bioware was really good at this, which is probably why we had such immersion with a lot of their games. The fishing village is nearby, but the fishermen who are trying to help the illithid just whine that their boat is messed up and they're stuck (my wizard: "... so no using the random boats that litter the shore then?"). The said fishermen also notice the tadpole and scream and run away (why the hell do they know about illithids, what they do, and the tadpole thing, to begin with? It's not like they crawl out of the underdark every tenday...). A gigantic nautiloid crashes but the Flaming Fists ignore it. The illithid decides not to slurp down the fishermen's brains but instead waits until the PC comes along (stop being a picky eater, illithid. You have 3HP left). Astarion whines about not having seen his face in 200 years when (in my playthrough) he has a scroll of mirror image in his pack (and yes, it works on him). Also, why would a rogue with an INT of 11 be able to read a book that is apparently difficult for my wizard? Etc.

I wish Larian would address these problems, as a lot of them aren't that difficult to fix, with a few lines of dialogue. I doubt they will. With any luck the fishing village would be on the way to Baldur's Gate, although why the fishermen would fish so far away from their homes would be a bit puzzling (maybe a good fishing spot is where the PC crashed?).