Opeth,
With that in mind here are some decent places taking into consideration that you are in Everett. Some are more crowded than others and if you can take a day off and do it during a weekday that would be even better and some do require a bit of driving to.
Out of town
Deception Pass - Great beach front and there are multiple locations from the beach to some of the cliffs overlooking the sea. Small amount of hiking to get to the nice cliff locations.
Snoqualmie forks - North Fork, Middle Fork, or even the South fork for a small riverside wedding these would be ideal. Scout out possible locations beforehand and bring your flyrod!
North or South fork of Skykomish river - another great riverside wedding, again scout it out first.
In town
Arboretum - Gorgeous in springtime with the blossoming trees
Beach front state parks - Parks like Kayak point, Forest Park, Mukilteo state park, meadowdale etc. Take a look at Google maps and there are numerous parks on the ocean.
Hopefully those give you some ideas!
Chris