Generally, we don't set up shop in swamps. Too close to sea level, too hard to see anything, and too little space to work with due to all the indestructable trees.

For short term, we just park the boat close to the shore, then neutralize all hostiles. Return by nightfall and leave after that. Little to no risk of the boat being attacked this way.

For long term we set up a base just outside of the swamp, usually in a nearby meadow or black forest. Again, just better land to work with there.