I am no expert, but I did do a tour down the Pacific coast in parts of Sept / Oct last year. You are bringing way too much for my liking. More stuff = more weight, and with all those constant hills you will want to be as light as possible. Take a second look at all that clothing. Jeans are heavy and not necessary. You can eliminate alot of the redundant clothing and instead wash what you bring as often as possible. Tide makes single use laundry detergent sink packets that work great. Just bring a rubber sink stopper and wash clothes in any sink. Most campgrounds have sinks in bathrooms. You can also purchase something additional along the way if you need it like a T-shirt for $10 or $15 at a surf shop and then just throw it in the garbage if you don't want to keep it or wash it. You also won't need the 20 degree sleeping bag, especially with the fleece clothing you are bringing. I used a 1lb 50 degree bag with long johns and down vest and that worked perfect. Water purification is not needed. Water resupply is available usually in small towns commonly spaced every 10 to 30 miles. In fact, from Astoria to San Francisco I only carried more than one water bottle about once or maybe twice. Bring toilet paper, maybe this is an unmentionable that you already were assuming on taking. I have a no electronics rule while touring. It's just more weight to carry and life can be pretty good without for awhile. You are going to love that tour. It's absolutely beautiful!