Town Founder

For access to the Tree Portal in Candeth Keep, speak to the three NPCs in a tent in Wai Jhou. Then give the three of them a total of 100 partial bags of salvage (each one takes a different type of salvage). That is 100 bags total, to in any combination to the three NPCs. For example you could give 50 to one, 25 to another and 25 to the last one.

Once you've handed 100, you are flagged to use the portal and will be given a Candeth Stamp. You can continue giving bags if you wish, once you hand 100 to each NPC individually you'll get a hat reward (different hat from each NPC).