Down at Water Front Park, (on the Willamette River that runs through the city of Portland), is the "Bavarian Beer Festival, right now. After a few gallons, there, you drive south on Interstate 5, to Salem, for the "Willamette Valley Wine Festival".
Leaving Salem, you cut across country, over to MacMinnville/Newberg, area for the "Mid Valley Wine Festival". When done there, it's off to Hood River, for the "Mount Hood Beer Fest".
These all go on, during the SAME weekend and are all covered by car, very easily in a day's drive "around the circuit". (IF, that is, you can still drive, walk, and/or, crawl).
On Sunday, of this same, long, weekend, if you wish to cleanse the hops and grapes from your innards, you head over to Cornelius Pass/North Plains, and join in the fun at the "Elephant Garlic Festival", held there.
I don't know of very many, IF ANY, real "food festivals", held in Oregon. We take our festivals too seriously, and figure we can eat at home!?!
Saint Paul-"The Highly Confused"
You cannot do a kindness too soon, for you never know how soon it will be too late.
-- Ralph Waldo Emerson