Public transport to the pacific? Considerations and plans

I saw a post on reddit today about how this guy went to La Push by public transport. La Push is a beach on the western part of Washington, along the pacific coast. It takes a few hours by car to get there. He suggested that the trip by public transport would cost about fifteen bucks. The time taken would be eight hours, but ah what eight hours they will be! Scenic! Full of nature's great offerings! Oh what views, ah the vistas we will get to experience.

I haven't done my public transport explorations in more recent times. Thinking it might be time for me-the-urban-explorer to make a comeback. How about I spend a day going to the Penninsula, camp a couple of days there while working from my laptop, and come back in public transport? Or make it a weekend trip even? Perhaps have somebody pick me up? The possibilities are endless and I really do want to become that sort of bus-explorer. Specially because traveling by bus in the rest of the USA sucks, not in this part of the country though.