When we roll into a campground with CABLE TV hook up I add a TV SIGNAL SPLITTER at the pedestal and run one RG cable to the trailer CABLE connection and then throw the other RG cable under the trailer. Then when we want to watch TV outside we just hook up the second CABLE TV to the cable that was under the trailer.
The best more permanent setup I liked was this one which is just inside the storage bay on a swivel mount. Just open the storage door and swing out the HDTV to watch it... If the weather gets bad or you all walk away from the patio area just swing the TV set back into the storage bay and close the door...
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You can get those swivel mounts almost anywhere they sell TV's Check out WALMART or AMAZON...
I would pick up a HDTV SET size that would fit the inside of the storage door and then just leave it mounted there. When moved back inside it will fit up against the inside wall pretty flat and take up much of your storage area... You could use the same idea of using a TV SIGNAL SPLITTER at the pedestal for CABLE TV and hook up the second RG cable to this HDTV in the storage bay.
Roy Ken