[77newell]

Hey Mike: the I used is the Adco that Sean mentioned. While it didn't seem to trap moisture that I could see on the outside I suspect that the lowered air circulation in the coach left what felt like higher humidity inside when parked on gravel. I don't recall this being the case when I had it parked on concrete. Please take this as anecdotal as there are probably a lot of things that could change from one location to another, but still this is what I noticed.