I saw them for my 21st at 930 Club in DC in 2011... awesome. I have been dying for them to come to the farm for years. Whoever runs their Fb page teased me with a Roo'mer weeks ago. I commented on something, about how great it would be to see them at Roo, and the Cake page replied to my comment saying "maybe Cake WILL be there?". I died.
I saw them at Beale Street festival a few years ago. They were a lot of fun but they were obviously drunk. I've heard a lot about the whole giving away a tree thing though since then. I've heard some people say that when they give a way a tree it can take like 20 or 30 minutes because he's so fucked up, he can't even stay on track with his off track conversation. If I get to go, I plan on seeing them again.