Thanks for the tip! We will be storing the trailer for about two and a half month over the summer so I had started to think through how to prepare it for storage. I'm glad this happened now and not when it was stored.

I had heard others stuffing some holes with steel wool and also knew that it was very flammable (I have used it to start a fire with a battery) but never considered the implications of using it in the camper. I don't think the risk of a fire is very big but I agree that it would be better to use copper just in case.

Thanks for reading