Go to YouTube and find the video from the guy who did a positive air pressure test on five different RV’s. He popped smoke bombs and applied pressure. You will never fill all the holes.
Sticky traps. Lots of sticky traps. Apply poison around the outside of the camper. Get a cat. Buy a pellet gun. Maybe a hawk or an owl. You can’t never plug all the holes. They can squeeze through impossible small spaces.
Go to YouTube and find the video from the guy who did a positive air pressure test on five different RV’s. He popped smoke bombs and applied pressure. You will never fill all the holes.