That swamp looks small. Mountain too. I doubt you will get much resources there. I would skip that part and make outpost somewhere else.
You actually dont need an outpost near swamp if you are going for iron. Place a portal at the crypt nearest to the sea and work your way from there. Collect iron from other crypts in chests next to the portal and when you are finished just pack it all in the boat and sail home. Just be careful, entering swamp from the sea can be very dangerous.