Raspberries and strawberries are in full force at Columbia Farms at Sauvie, I was there yesterday.
I like Morning shade farm down in Canby as well, they have a huge variety of unique berries. I don't know what's ripe there at the moment, though, so you might want to check first.
Also I love the Gorge white house, might be too far for your preference but it has some amazing views of Mt. Hood and is super idyllic. Not the top of the list for variety and amount though.
Usually blueberries tend to follow strawberries but they seem to have been a bit slow this year. I expect some farms will have some in a week or so. Hope that helps!