Tuck Longtoes in the Nybright Camp in Lesser Faydark ( 104, -22, 318 ) /waypoint 104, -22, 318 asks you to gather some wood for his cooking. The wood is gathered from Treespirit elementals, he will tell you a couple of locations for these but there are plenty near the Greater Faydark zone ( -537, -40, 363 ) /waypoint -537, -40, 363. Any type of treespirit will do.
Alternatively, you can simply talk to the Stable Master in the Nybright camp (Loping Plains Station), and ride to the Upper Grove Station. There are several in that area that spawn, however there are also a couple of named heroic elementals that spawn in that area as well.
Return to Tuck for your reward of 9g 62s 23c, faction with the Nybright family, and this opens up the next quest, "It's Better Than Bad, It's Good".