I seem to be stuck. Rescued David from the tunnels, but I can't follow the river to the west farstal plains to retrieve lost items in the Scattered Possessions quest. I'm blocked from following the river by a tree.
Rescuing David is just a side quest. To progress, you have to reach the top of Mount Fartha and fight Yidakna, the Juggernaut of Shadow. The exit to reach him is to the north of where you find the save point, you'll know you're there when you get to the save point :) After that, the way onwards to West Farstal will be opened.
Can you try it again, click any links on the left if it doesn't load.