I'm planning a trip to the Coast during the last week of September and am arriving and departing from Portland. I have never been and have a week to see as much as possible. I'm not sure if it's feasabile to see the entire coast. Is there a central location we can stay to see the most of the coast or would you advise in staying at various locations. What are the "must sees"? We're not into shopping or commercialism. Want to see the best beaches and the best nature has to offer. Thanks for any suggestions.