I believe this same question was asked at the start of another recent thread, and there were quite a few responses with information about cruising this area, where to meet other boaters with kids, etc. I'm not sure which secdtion of the forum the question was asked, but you might want to do a search for it in the archives. I think you'll find a lot of good ideas in the responses.
PS-- Found it. It's in the Voyagers and other Boaters on the Go section of the forum, and the thread is called Pacific Northwest 2015.