Which day did you go to the Expo?
Coconut Island was only there for one day - the Saturday. So you may have missed it if you only attended on the Sunday.
$#$I went to the expo on the saturday ,& it was chockers. It sucked waiting to play a game ,I went to the 3day Texas U.S.A ,expo & found it very organized.Gary stern had a seminar on his business,it was cool ,u could ask him anything about stern pinball.He only looks forward when talking pinball, as a few people were asking about releasing some retro style pins ,(but he wouldnt have a bar of it) ,he only wants his business moving forward. 
Yeah, sounds like you came in later in the morning or in the afternoon. Early Saturday morning you could actually get on games straight away. Coconut Island was over near the RHS wall as you looked toward the front of the hall, and it was next to the AP stand.
There is no doubt the response to the Expo was bigger than expected! I imagine they might try for a larger venue and more machines on the floor next time.
