There are several sites that post the current prices of fuel in the Puget Sound area. Here are a couple…..

Fuel Prices around Puget Sound-NWboatinfo

Fuel Prices around Puget Sound-ActiveCaptain

Most marinas sell ethanol free gas (better for your outboards, generators). Some marinas have shallow water access at low tide-sailboats beware.  Many also have pumpout stations. Call the marinas for verification of these.