When I was doing this back before the NATIONAL BROADCAST TV channels went DIGITAL I brought along a portable DirecTV dish that had two output ports on it. I always sit this on the bed of my truck so it would remind me to put it away when we left the area for things...
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I ran RG cable from the two ports- one going to the living room area HDTV and the other RG cable going to the bedroom area HDTV. In one of the RG legs I used the SAT LOCATION METER like this one shown to find the DIRECTV SAT Signal.
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In each location I hooked up the RG cable to the SAT RCVR ANT port I brought with me from home. I then hooked up the VIDEO OUT from each SAT RCVR to the VIDEO INPUT on the HDTVs. Don't forget to bring along your SAT TV ACCOUNT info and 800 phone number with you. Seems like everytime I disconnected my SAT RCVRS from the house I would have to get DIRECTV to turn them back on for me. This is all legal to do moving your SAT TV equipment between the house and the RV so don't worry about that. You will however lose your local TV channels when you get outside your zip code area so be aware of that. Larn how to pick up the local station off your BATWING OTA antenna to watch the national broadcast channels on your trips.
This worked out pretty good picking up the standard SAT TV programs but I was always afraid the portable SAT DISH was going to grow feet and wander off on me.
When the NATL BROADCAST came out a few years back we quit bringing along the SAT TV stuff and just use our OTA BATWING antenna to pick up local HIGH DEF HDTV signals from the local towns now. They are all transmitted now in HDTV full screen high def TV mode - much better quality than standard SAT TV signals.
Roy Ken