There aren't many places to stay on Whidbey Island, however there are a few different cities to stay at close by, check out: Skagit Valley, Mount Vernon, Mukilteo, Everett, Marysville.
From Everette and Mukilteo you can take a ferry that gets you onto the south side of the Island and then you'd drive up North to get to Coupeville. From Skagit, Mount Vernon, Everett, and Marysville you would just drive up to the North side of the Island and drive South to get to Coupeville!
Air BnB and VRBO are also great options for comfortable stays in the smaller towns surrounding our wedding destination:) But we have added a couple hotels with great reviews for you to check out as well!