Truck Camping in Seattle???????

I know we have really enjoyed staying out on the islands and only ferry riding in on foot. Can walk to al the downtown stuff. I always say the Washington ferries are like a tourist ride at public transpo prices. We've stayed at Faye Bainbridge State Park and ridden the Winslow Ferry. The only problem is if you have to drive the rig to the ferry parking it can be a challenge though I managed. The Bremerton Ferry option is great if there is great parking at the terminal. I'd like to find a place you could camp where you could actually walk or catch some other form of public transit to the terminal easily.