I've traveled these waters many times. I can tell you that I always go very slow in two places on your track. Counting from the top (the way points - dotted circle); between number one and two there are some wicked fouls. My Navionics chart shows a channel there - and I've always motored on through. Last time out, I hit something HARD. I couldn't find anything on my motor or hull that looked damaged, but my depthfinder was showing 6 ft when I whacked it. I'll check my GPS unit (I think I marked it). Right at point 7, it can be ugly. I've seen guys blow through this area. I have a deep V aluminum... I go way slow and often trim up my outboard and go with the trolling motor (can be very good fishing at Fox Ferry point). You can also use the tide(s) to your advantage. If low, go slow. Between 4 adn 5 it can be shallow, but I've never "hit" anything in that region.
I have to read up on exporting, but I'll try and upload my tracks...