Of Course! But there will be alcohol and dancing.
PSC is minutes from the church and close to the hotel.
They are both about 3 hours away. You can consider renting a car, but it would be during winter. So consider road conditions.
We personally love the drive, but the mountains can be tricky in the winter. If you choose to drive, I recommend leaving CA late at night so you hit the mountains during the day (leave WA early in the morning on your way back). Brush up on your winter driving condition tips just in case there is snow in the mountains. If you break the trip into 2 days, Redding is a good midway stopping point. Make sure you have good tires and be careful.
The Red Lion Pasco (where we have room blocks) and Hilton both have shuttle service from airport to hotel. If flying into PSC, Angelica or a family member can also schedule to pick up and take you to the hotel. On the day of event, there will be discounted Uber service to and from the wedding/reception.