We really enjoyed the Evergreen Aviation museum at McMinnville Oregon. We spent 1 & 1/2 days there & could have spent more time. There is a very nice RV park right next door - Stone Village - there is a paved walking path between the park & the museum.
The Sea Lion caverns was also a very interesting stop.
In Lincoln City you can make your own blown glass fishing float.
We wanted to do the Rogue River jet boat tour but the river was flooding when we went through in spring of 2012 so that will have to wait for another trip.
Walk some beaches & look for agates.
At Charleston ( near Coos Bay) Chuck's Seafood shop sells excellent smoked salmon & tuna.
Stop at Mo's in Lincoln City for excellent clam chowder.