I'd also like to note that spirit drumming is not the only thing to watch for at Nettle Lake. Depending on how much you've had to drink, you may or may not catch a sight of Nettie, Nettle Lake's resident sea monster. Descriptions of Nettie range from a tree stump or stone, all the way to an ox or a bear. She splashes the water close to the edge, or exposes more of herself further out.
Not especially aggressive or dangerous, but she does snag the occasional human being to take down to her lair for lunch. Philip Knight and his canoeing partner disappeared while crossing Nettle Lake together. So be careful, and be aware of what might live in the water beneath you.