The place with Paul Bunyan out in front is The Trees of Mystery, nice potty stop.
From Tillamook south to LC is not on the Coast but inland somewhat. Just before LC is the Portland turnoff and the Town of Otis. Otis Café is great place to eat, especially breakfast.
In Depot Bay is Gracie's Sea Hag, great chowder. Great Taffy next door. Parking for RV/towed is minimal.
Sea Lions Caves has RV parking lot. Summer time is NOT Sea Lion time, they are out to sea then. Calving is winter and better.
During the week of the eclipse is going to be rough and you can expect tight LEO enforcement of parking and stopping roadside. It's been in the papers up there. Depot Bay is just south of the travel line for the eclipse.