Northern bridge, an ambush by 2 Ogre Berserkers and 3 Hobgoblin Elite archers spread along the brige in BG:EE or on the western side in BG. The archers shoot poison arrows. Strategies, roughly in order of preference:
approach from the west after crossing the southern bridge (BG only),
retreat to the east and engage the Ogre Berserkers out of range of as many of the archers as possible (BG only),
engage with a full party of ranged attackers and engage one enemy at the time – two ogres can be lured away from archers,
avoid the whole thing.
Neville at 3800, 850 is an unusually polite bandit. He has 5 hobgoblins hidden in the trees to help him.