Are there new quests NOT related to the new NPC's?

Ok, so maybe I'm imagining things, but I just did this quest I don't ever remember doing in the original baldur's gate. Most of the stuff I remember, but some guy in Beregost was asking about his son, who he shouldn't have let travel when it's so dangerous. I found the caravan, brought back jewelry, easy quest. I just don't remember it. I can chalk it up to poor memory or whatever, but now I'm curious if there are other quests. Any thoughts? Thanks for your time!
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No.
The Black Pits don't require the new NPCs I guess...
Apparently it's need to know and I don't need to know.
Overhaul can get away with this example because it was part of the intended original content, so they can class it as a "fix" rather than "new". However, because their contract forbids tampering with original content, it is unlikely that they'd introduce wholly-new quests which could be accessed without the new NPCs.