If anyone was wondering, here's the directions for the quest:
Hail Feskr and he says 'Erh? If you not be here to help Feskr with his [problem] then Feskr wants you to leave. Say, 'what problem?' and he says 'You wish to help? Orrderrr of supplies I order not arrive, ship sink. Now Feskr needs supplies. Feskr need bottle of Tunares Finest ( you can purchase in Felwithe), Thunderhoof Mushroom (forage in SK), Tea Leaf (forage in EK), and Handmade Backpack (tailoring skill). Rrrr, strange items but Feskr need to sell. You bring Feskr give you nice bag." Give Feskr the items and you get the rough leather sack, a weight reducing backpack.