I also just took off the outside vent covers for the fridge, and I noticed that they missed siliconing all of the exposed cut wall scetions. The bottom and one side were done well, but the top and one side were missed. And this is an open cut into the syrofoam heart of the wall.
Over time, I could imagine moisture penetrating into the styrofoam, especially if the camper sat ourside all year. And we all know what that leads to!
After lunch, I am going out TODAY to finish caulking up those areas. I am also going to remove a lot of the screws that attach things like storage door holders and silicone them in as well.
I figure there is no such thing as being too careful, especially when the alternative is delaminating walls on a camper that we really, really like. I noticed that FR changed this model, so we can't even get a new one if we wanted to.