Haha, I was just going to start rallying for troll appreciation myself, I've been re-reading my Kings of the Broken Wheel and admiring Picknoses's gusto. Everyone figures out that I love Dewshine, but Picky-Picknose is a favorite as well.
As for the oak tree problem, Trollbabe, I'd get some of those mosquitos that cause hallucinations in elves. They'll be easy to pick off when they're running around in a drug induced haze, after all, leaving the tree nice and safe. :)