Possible wedding sites:

• San Juan Island
  
  
  
  • Lakedale Resorts
    
  • Roche Harbor
    
  
  
• Orcas Island
  
  
  
  • Rosario Resort
    
  • West Beach Resort
    
  • Deer Harbor Inn
    
  • Homestead Orcas (basically a B&B)
    
  
  
• Non-Seattle
  
  
  
  • Mountain Spring Lodge (Leavenworth)
    
  • Semiahmoo (Blaine)
    
  • Scimitar Ridge (Anacortes)
    
  • The Cutting Garden (Sequim)
    
  • Harbor Creek Lodge (Gig Harbor)
    
  • Lord Hill Farms (Snohomish)
    
  • Alderbrook Resort (Hood Canal)
    
  
  
• Seattle
  
  
  
  • Pike's Place Market
    
  • Century Ballroom
    
  • Stimson Green Mansion
    
  • Union Station
    
  • Salish Lodge (Snoqualamie)
    
  • Pickering Barn (Issaquah)
    
  • Daybreak Star Center (Discovery Park)
    
  
  

Other site listings:

• Travel San Juans (.com)
  
• San Juans: List of 10
  
• TheKnot.com listings
  
• MySeattleWedding listings