So I found a Rock Troll trolling.

Found a rock troll on a small island, singing away to himself. After talking to the troll, he tells me a soldier approached him and asked him to guard some boats. But after looking around, Geralt notices the boats are in pretty bad shape, so he asks the troll what the deal is. Mr.Trollololo decided the best way to guard these boats would be to put up a fence. But where will he get the wood for the fence? Oh, the boats are made from wood, he'll just use those!

I think this troll might be trolling just a little bit. The clues might be in his dialogue: http://imgur.com/a/2VnMO

As of writing this I haven't finished the quest yet. He's a funny old rock troll, and such a fantastic singer. Jesus Christ I hope I don't end up having to kill him. I just finished the Bloody Baron storyline, I really need this quest to go a little better...