There are three airports to consider when flying into Seattle: Seattle, Paine Field, or Bellingham, depending on your departure location; Seattle mgiht be the otimal choice for some, while Paine Field or Bellingham may be more suitable for others.
Hotel
Swinomish Casino & Lodge
12885 Casino Drive, Anacortes, WA 98221
The Swinomish Casino and Lodge could be a suitable place to stay on Saturday night, given its proximity to Skyline Marina, from which a small ferry to Decatur Island departs at 10:00 AM on Sunday morning.