Little over an hour north of Lincoln City is Sandlake, and farther north and towards Portland is Brown's Camp. Another two hours to the south is Florence, and it's endless dunes!!
You'll have to let me know when you roll through, and if I got the day off, we could meet up for some lunch or something. Since I'm in Tilly. Do the coast line drive down hwy 101. Hit up Astoria, Seaside, and Cannon Beach. Fun little places to just walk around and do the touristy thing.
And once your in Lincoln City, hit up the Lighthouse Pub on the north end of town. They are a McMenamins place. And great food. And there is Kylo's on the D River. Where the kites will be flying.
Let me know what your plans are, and maybe I can give you some ideas of things to do/see.