I have to say that my experience with Ferries in Puget Sound is that they are very aware and give boaters wide berths ( I try to return the favor ). Edmonds isn't the busiest area, but it can get crowded some days. I've never felt even remotely worried, but then I keep a very close ferry watch when I'm out there. Between that and the VTS it keeps me awake.
The closest call I had was a cruise ship way outside the VTS. I saw it coming miles away and tried my best to sail out of it's path but it kept turning to intercept (did I mention it was way outside the VTS?) To make matters worse it had two coast guard small gunboats escorting it and they enjoyed zipping in circles around us with their machine guns waving. I could tell they enjoyed it because they were smiling, laughing and waving. Between those two wakes it got rather interesting out there. Man, those cruise ships are HUGE and for some reason travel well outside the VTS occasionally. annoying!
Puget Sound VTS and Edmonds/Kingston ferry route in my sailing area: