Do you have a photographer's ephemeris? That will tell you not only the time of sunrise and sunset but where on the horizon the sun will appear or disappear.
There's a free one called TPE, by Stephen Trainor. Always helpful for landscape photography.
When are you going? There's a full moon on Feb 28. I got some great night shots there a couple of years ago. A tripod, a remote shutter control and some patience will give you something special that doesn't look like a me-too photo.
It's normally the wrong time of year for thunderheads, but the area's been getting some unusual weather. (My mom lives in Prescot, 100 miles south of there). Pray for thunder clouds. If you're lucky you can get some spectacular light in mid-afternoon.
After the "magic hour" you can still get take great photos using HDR techniques. Don't be put off by the radioactive glow that some HDR photos show. That's totally an artifact of processing. It's possible to use the technique to make normal appearing shots. It's just that you can shoot during the rest of the day and still make attractive pictures.
michael mckee
My Port Townsend – A City in Photographs – 365