Sorry for the late reply. Here is a map of the swamp I drew years ago. Left and Right are sometimes reversed, so it's a bit confusing to follow...
First, you need to reach the Burning Bridge to get a key. Then, your aim is the Locked Gate, where there is a checkpoint. You can also get the checkpoint first, before getting the key (not sure if that makes the key path easier.) I hope this helps somehow. The area with the statue and the barn is for a later point of the game.
