they would look great, but I have two concerns
1 - cold!
2 - I don't think they are made for wet areas and you may have trouble sealing between the tiles. water behind the tiles is asking for trouble. Have you considered having a metal shop fab up some wall coverings out of Aluminum sheet? the cost would likely be less than the tiles and you could minimize or eliminate seams. Otherwise, I would attach the tiles to a sheet of plastic to separate the tiles from the Airstream wall, and "grout" them with silicone sealant.
1977 Safari Land Yacht
2005 Toyota Tundra SR5
2010 Ford Flex Ecoboost