Historic Snug Harbor
Information about the resort on the Snug Harbor peninsula off Ryer Island:  Address is 3356 Snug Harbor Drive, Ryer Island, but for mail use Walnut Grove, CA.  Snug Harbor Drive is connected to E. Ryer Road, between the Rio Vista Ferry landing and the J-Mac ferry landing, on Ryer Island.  Snug Harbor Drive is a private road-please drive slowly!  the portion of the road where there are private roads is graveled, but it is paved within the gated resort facilities. 
Snug Harbor Resorts LLC marina and park layout with waterfront rental cottages and RV sites on Steamboat Slough

.  RESERVATIONS REQUIRED to stay at Snug Harbor.  http://www.snugharbor.net  However, you can stop in and get a cold soda or munchies while on your bike or ride tour of the Historic Delta region.  There is also a seasonal farm stand across the road on East Ryer Road, very close to Snug Harbor Drive.  Snug Harbor Directions Is a pdf you can open in your phone.