Ask Harlan if he needs any odd jobs done. Well now, since your offering him your services, he needs to get some provisions picked up from Zeke's over on Rider Isle.
He already sent Zeke the list and gives you pearls for traveling. Well, Zeke has almost everything. Emphasis on almost. he just needs you to find 25 Huckleberries, and you did promise you'd bring Harlan his provisons so off you go hunting for those huckleberries!
Bring back the hucleberries to Zeke and he'll put them in the provisions to send over to Harlan. Take them to Harlan who is happy as a clam to get them!
Reward: A Dinosaur Bone, 50 quest points and a Bean & Rice Burrito. Enjoy the Burrito!