Is there a reason that you are doing the ride clockwise? it is September but the good weather wind is still from the North. generally the riders doing the Pacific Coast route go north to south, so there are built in advantages. also, that puts you on the view side which means that you are not crossing traffic to get the picture or chat with other cyclists. I would like to suggest that you look at the alternative of riding to the Bainbridge Ferry (downtown Seattle, with bike lanes and/or path all of the way) then head towards the Hood Canal Bridge and a really great ride of about a week.