My family would like to vacation for a week in the San Juan Islands and Seattle.We would fly into Seattle drive to ferry to San Juans. We would like to find a good island to serve as a base and then take day trips for biking on different islands. Where would you suggest we stay? Where is the best biking? Can you explain how the ferries work and how early you need to be to catch them? Afterwards we'd like to go back to Seattle and spend a couple of days in the city, before flying home. I welcome your ideas.