> to meet some friends for a 4 day backpack starting at Shi Shi Beach. We're all meeting in Forks

How are the other 4 getting to Forks? Are they locals?

None of them can give you a ride?

1. Land at Seatac
2. Take the Light rail to the Pioneer Street Station ($3.00)
3. Walk .5 mils to the Seattle Bremerton Ferry terminal
4. Take the Ferry to Bremerton $9.45
5. Have one of the friends that will be driving to Forks pick you up from there,
6. It is 10 minutes off of SR 3 which is a likely way that they will be heading to get to Forks.
7. 2.75 hour drive to Forks

OR

From step 5 take the a bus to Forks, would need more info and times to get pricing this way. nasty amount of time.

OR

Rent a car, might be wasteful if you were vacation to a city with transportation options, But you are going out in the wilderness and renting a car to do that is an entirely reasonable and in this case sane situation.

Ford Focus, From KAYAK for ~$175 for 5 days