Visit the aquarium in Newport, Devil's Elbow and
Heceta Head state parks (famous lighthouse); maybe take a day to drive inland and tour the Oregon State Univ. campus in Corvallis. Head south for the sand dunes south of Florence, or go whale chasing out of Depoe Bay.
Mo's is a chain with branches up and down the coast; there's no need to go up to Lincoln City.
http://www.moschowder.com/index.php