How did the tieflings actually get to the grove? Like, seriously, where did they arrive on the map and how did they get from there to the grove? They were heading along the road from Elturel to BG and got ambushed by gnolls sayeth Zevlor. That would suggest they entered near the tollhouse, but how did they get to the grove from there? I don't recall any tiefling dead near the tollhouse for a start. And the only land route from there to the grove passes over a broken bridge and through the village full of goblins. So how the heck did they manage to make just that short jaunt with kids, livestock, and supplies and not get wiped out or lead the goblins straight to the grove?