I have DirecTv in my home. I used to take the main box and a tripod-mounted antenna in the trailer. Big pain at times finding the satellites at times. Plus all TV's had to watch the same program.
I upgraded my home to DirecTv Wireless Genie system and I installed a Winegard Travler antenna on the trailer's roof. Now I take the main box, the wireless units and hook them up in the trailer. When we get to the campsite I push a button and the antenna finds the satellites it needs. This is also the only way to get HD programming with DirecTv. One other point is the Genie's use HDMI cable so you have no signal interference from your trailer's coax cables. Best thing is every TV can watch something different, which is great when the grandkids are camping with us.