The CS2 and similar versions spend years out in the weather...
The Winegard SS1000 is an unamplified competitor to the HDX1000. (Which is where head went earlier.) Not a great choice for rejecting multipath... but no power needed and it's got a plastic 'dishy' look.
http://www.winegarddirect.com/viewit...0%29&p=SS-1000
If it was my tailgate, I'd use an Antennacraft U4000, half the price, much more passive gain, a bit better at dealing with multipath and fairly easy to refold for transport.