In Alaska 7 years ago, we ended up with hundreds if not thousands of mosquitoes in the camper one night (no particular screwup, they just swarmed in every time we went out - it was the only issue with mosquitoes we had the whole trip).
I had no idea how to get rid of them all. In the morning, I had the bright idea to take the screen off the Fantastic fan in the cabover in our AF860, turn it on high exhaust, and hit the road - half an hour later, no mosquitoes in the camper, and all I had to do was clean the leading edges of the fan.
- Clay