You can walk from IF through Dun Morogh to Loch Modan. Obviously fly, if you have the FP. Go north through Loch Modan, and you'll find yourself in the wetlands. From there, travel west to Menethil Harbor. Once there, there are two boats. Do not go in the boat that never moves! The one on the left goes to Dustwallow Marsh, Theramore. The one on the right goes to Darkshore in Auberdine. Be sure to also pick up the flight paths in Loch Modan and in the Wetlands.