That was my fault, I wrote down in my notes that the library was scheduled for the 18th, but I made the reservation for the 19th. There was another group booked in the room, so we couldn't just invade. We ended up moving to the park across from the hotel. Next month we won't have that issue, we actually have the hotel room for the entire day, so I'll probably be showing up early to answer questions for people and provide mini-walkthroughs of the convention space.