Well, I guess it is a mute point if the OP doesn't have a genie. I'm not sure how any other setups work. The genie is my first sat, which is HD, and uses SWM. Since I started explaining it, I'll try to finish explaining how this system will work fine with the exiting wiring in the new trailers.
First, make sure your antenna booster is turn off in the living room.
The sat cable has to enter the trailer via sat connection at outside sat connection. The sat connection would then connect to the sat box in the trailer in the living room. One would think a splitter could be used In The living room to supply the sat signal to the trailers park cable wiring. This would not work in my trailer. I put a Walmart two way splitter on the outside of the trailer, and connected to both the sat and cable connections. Be sure to follow the in and out labels of the splitter.
The cable from the sat connects to the in, and the two outs of the splitter connect to sat and park of the trailer. Apparently, the signal from the main genie box is bidirectional, and will travel from the genie back to the splitter, and then back in the park connection to each connection. I have a genie HD Client in the bunk room, master bedroom, and outside entertainment center.
The wiring in the 2014 FR Haritage Glen lite is a perfect setup for the direct tv genie system, if you know how to set it up.