Billy's Island Map

Above is the only map that I have of Billy's Island.  It appears to be somewhat accurate and matches a track profile that I have in another book.  Not the best snapshop, but I hope to find a better one when I visit the park next time.

Here is my plan so far for Billy's Island and all the structures that I've planned to construct.  I've not begun to draw any of the structures yet.  There are few photos to work from.