Its really not that confusing, and it is A LOT BIGGER in person!

But you really should get a Bizer map... Its much clearer.
There is a clearly marked short channel between Eagle Is and Governor's Is. This channel is a No Wake Zone.
The Passage between Eagle Is and Pitchwood Is. is also pretty easy. There is a lighted marker (red dot #44) Just go between the Red marker and the closest black marker and you will be fine.
Woodsy