First time we went to the swamp, we found it hard, but right now we're on our, I don't which runs anymore, and the swamps wasn't that big of a threat. You learn how to navigate it, learn how to parry reliably, set up a small outpost outside the swamp in meadows or black forest and leave your ship there too. Build a portal that goes to your base. Craft good food, upgrade your armour/weapons if needed. Try to navigate on the branches and fallen tree to avoid most enemies, use your sneak bonus from the troll armour. Make some potions (healing and anti-poison). And if you really find the swamps to be too much, the mountain and plains are even harder. So learning how to stay alive is the most important thing, then it'll be breeze, even wandering the swamps at night in troll armour becomes pretty easy.