We did a quick one-night trip to Rock Island and stayed at one of the backpacking sites. It was fun to take the two ferries in to the island, and the campsite was a very short hike from the dock. We did a day hike around the whole island that afternoon/evening and departed the next day. I would not have wanted to stay for longer than the one night since the island is too small to permit much in the way of day hiking, but it was a fun destination for the short trip.