Whew! We very-nearly have a full party on their way to an encounter!
I can't believe that I nearly feel like I rushed that last one. As long as everyone has the basic imagery.
The threat is upriver, and mostly on the far side. There are three boats full of hobgoblins and goblins. They are firing arrows from the water, beaching, robbing and raiding, and jumping back in their boats and moving to the next few cottages (when they are far away from each other, or on foot if they are close)
A ship-to-ship action in the dark could be pretty dangerous.
Perhaps the best idea would be to put straight across and travel north by foot, gather survivors, and find where the goblins have put to shore to raid.
Otherwise, or after that, If you can lure a boat downriver, archers on the wall can lay a volley into it. If you can get it stuck in the shallows, it's done for.
Let me know where you'd like to start.