We highly recommend making it to Lake diablo, Washington Pass, or one of our favorite hikes - Blue Lake (~4.6mi) https://www.alltrails.com/trail/us/washington/blue-lake-trail--7 - Park butte (~7.7mi) https://www.alltrails.com/trail/us/washington/park-butte-lookout-trail
La Conner is a quaint fun town to visit with shopping and views of the canal. If you make it up to visit we recommend the La Conner Tap for some pub fare on the water.
Drive up to artist point on Mount Baker Hwy for beautiful views of Mount Baker and the cascades. Pack a picnic or go for a hike. One of our favorite hikes up that way is Table mountain.