There is a KMLE country radio sticker and a Play It Again Sports, Scottsdale sticker on the back window. KMLE went on air in April of 1980 and the Play it Again Sports in Scottsdale appears to no longer exist. So the camper had to have been placed there sometime after 1980. Looking back at old Google Earth images, the camper is visible back to the June 6, 2007 image. It may not be in the image before that, Oct 4, 2003, but it's difficult to tell because there appears to have been a skiff of snow on the ground.