The problem with the satellite TV is the Winegard plate inside the coach is not compatible with the signal from the satellite dish. You will need to rewire it (which is a real easy job) to allow it to work properly.
In a nut shell you make a pass through plate. Get a dual 75 ohm F connector wall plate (a wall plate with two coax connectors on it). Unhook the coax coming from the outside connector to the current wall plate and hook it to one of the F connectors on the new plate. This will essentially be a straight through connector that will work with your dish. The other connector will connect to the current Winegard plate.
If you want to watch campground cable you simply hook a small pass through loop cable to connect the two connectors together.
Here's a PDF on my Google Docs with pictures.This guy modded his current plate...
I just bought a double headed plate at Lowes and mounted it next to the current one:
Hope this helps!!