Yeah sorry guys... When the creators said there are many ways to get out of the prison... I was counting the entire island
Mostly because... well... Typically that is what you mean when your on a prison island :P
It's a prison island in that you wouldn't want to be on any of it thanks to King Braccus' former shenanigans, but the prison camp only occupies around the western quarter of the island (or southwestern, I still haven't quite got to grips with the compass direction).