If you're sane you'll wait for the swamp to freeze and do this one on snowshoes. The other sane choice is to put it on you're ignore list.
The high difficulty rating is because you can't find it the way I hid it. All I had to do is try to stay on dry ground and avoid the worst of the thorns. I didn't care where I got to. I zigged and zagged a lot. You have to reach a specific point.
Fgnl pybfr gb [gur uvtujnl srapr] nf ybat nf lbh pna. EBG13 rapelcgrq