HI Dan, Nicely thought out list. I walked the Juan de Fuca in August, but I had very hot, sunny California conditions, so my experience is quite different from what everyone warned me about. I still wonder how my own gear list would have fared if the rains really had come.
I would think the Mont Bell hoods would work fine, as long as you had some kind of wind blocking layer over or under them. SInce you're not carrying a windjacket and your rain layer might very well be wet, probably the beanies are a good idea. You want to have something warm and dry in the quilt. I guess you don't want to bring a hat or light gloves of some kind?