Pretty sure you dont want to go through the booster (or the campsite in located in rear basement storage). I would suggest first connecting it to the receiver via cable through a window and connect the sat receiver to the tv directly using either the hdmi or other connections located on back of set. once you have that working you ready to get it permently wired. From what i can gather you will probably want to a) run a separate cable from external to the sat receiver inside the rv and use one of the many inputs on the tv or B) bypass the booster completely and thus be able to use the rear jack.
Im planning on installing an in-motion unit on top of the RV and will run a separate cable to the sat recevier (method A). The DW likes her TV and when momma aint happy.....i get to sleep under the RV