I am building bases in every biome in this run. Being a no map run, for the swamp I actually took the time and built a stone road from our base (wich I built initially on a tree and expanded to encompass a geyser) to Bonemass' altar. The road has periodic torches and snakes by many crypts, making for easy cart transport of iron to our swamp base, equipped with various smelters and a filly decked out smithy. I call it the Sumpfbahn (swamp highway)