For the Horde and Alliance you can also start it directly Gadgetzan. Try the butcher that is in the inn. It is a tough quest to start directly at 40(Do to the linking that you get trying to kill the Rocs), but it deffinately is doable. Remember when you are trying to get the giant clam meat, that the only Giant Clams that drop it are the ones off the coast of Stranglethorn. (learned this after looking through the ones next to The Barrens for an hour or two ;) )
Good Luck