You will have to weigh the cost of adding antenna to your Direct tv or use a dish Network month to month service for the months you actually need service. view 'pay as you go' for pricing of monthly service.
http://www.gotailgater.com/I use an automatic sat finder Dish Network tailgater portable dish (sometimes trees will block rooftop antennas) with month to month service. I call DN for reception only when I need to use it .
Every time I leave my campsite to go hiking or whatever, I lock up my dish out of site . It takes about 5 mns. to reset the antenna when I return and its all automatic.
It uses one single wire for reception as well as 12v power. Some antenna's use 2 wires.
The tech advised me to install my own thru the wall insulated connector, he said the standard ones used on rvs will burn out over time.
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Hi-Frquency F81 BARREL CONNECTORS: Packs of 10, 25, 50 and 100
3 GHz High Frequency F81 Barrel Splice Connectors. The internal components are much different from a standard VHF/UHF barrel connector. The center coax conductor indexes into a close-tollerance tube that is resilient (spring) brass and is gold plated. Internally, the center conductor tube is insulated from the inner skin of the barrel by a maximum air gap which results in much less RF loss. Insertion loss is a non-issue."
he gave me the F81 with the blue center. It works fine and I like using the separate connector for a dedicated sat input source.
http://www.prosatellitesupply.com/connectors-adapters.htmlmore info for various systems.
http://www.marxrv.com/sat.htm