Ambrosia Beetle

Not sure if this is where I post my question, bu we have ambrosia beetles that make sitting outside at dinnertime absolutely impossible. We had a gathering last weekend and they were in our food, our drinks, our hair, down our shirts, and swarming around our faces. They come out around 6:00 pm for about an hour and a half and then they are gone. I am wondering if anyone knows of anything that we can use to get rid of them. We live in a rural area of Oregon surrounded by trees. The Dept. of Ag helped us identify what they were, but basically gave us no hope to get rid of them, other than putting a bowl of alcohol out for them as they believe they are attracted to our drinks - which didn't help as they come out no matter what we are eating or drinking. Any help or ideas would be greatly appreciated! Cheryl