Originally Posted by Maxhise
You can not split a satellite signal
This is not necessarily true. If you are using DirecTv's SWM system, you can split the cable before the receivers as long as you use SWM compatible splitters.
However, you most likely cannot use your RV's cable hookups due to the possibility of there being (non-SWM) splitters somewhere between the connection on the outside of your RV and the connections on the inside of your RV.
If your RV has a separate satellite connection on the outside, it probably only has one cable run to your main television and not to any of the others. You can split your cable here, at your main television, or you can split it anywhere else you find the satellite cable, but you can only use splitters designed to work with your satellite system.
Ultimately, the most simple thing to do is install the DirecTv Wireless Genie System and put Wireless Mini Genie receivers wherever you want them.