I left Oregon on August 25, 2007. Had planned to stay in Klamath Falls, as they have some National Wildlife Refuges. On getting there just after dark, started to get lots of splats on the windshield. Knew it wasn’t raining. Then realized it was bugs, lots of bugs, to the point of not being able to see out my windshield. Stopped to get gas and get the windshield cleaned. So glad you don’t pump your own gas in Oregon. The attendant did not seem to notice the bugs, except for an occasional swat by his eyes.
Kept on going till I parked in a shopping mall parking lot in California.
On the online Airstream Forum I got this response which I think is correct:
“Those bugs were most likely “Midgies” They are from France and are deployed by the State as they eat Mesquito larve.
During daylight if you see a black smoke but no fire It’s the Midgies swarming.”