If you have an RV account and use and use a TRIPOD dish, then you can put your "Spare" receivers in the house and simply hook up and AIM when you get home, Same as you Hook up and AIM on a campsite.. If you use a automatic rooftop antenna on the RV, you should have a dish and tripod for those incidences when the roof mount does not have a clean view of the sky. (Parked under Evil Signal Eating Tree) :)
Finally, you can also (if parked close enough) simply run a cable from said Automatic antenna to the house.. Works best in all cases with DISH type not domes or portable "cube" type.