Traffic may be especially bad, if you're driving through the zone of totality the weekend of the 19th. Sounds like everyone and their uncle is heading down to see the eclipse. We'll be there as well. Every campsite along 101 is booked that weekend, so hopefully you have reservations. It's a great drive. We've done it several times, in different seasons.
My family likes the Fort George Brewery in Astoria, Fort Clatsop, the Tillamook Cheese Factory and the Sea Lion Caves.