OK - if you're going DishPro 119 only, that simplifies things EXCEPT:
Remember that if your house setup is NOT DishPro, you MUST be VERY careful when moving the camper's receiver back into the house. Do it wrong (instructions on request) and you can blow an LNBF or switch. This is because DP runs at a higher voltage than Legacy.
Anyway, back to the camper. I think you'd be better off forgetting about the funky switch junk and just use a DishPro splitter and diplexers to git-r-done. I can't draw worth diddly, so I'll try to just explain it.
You need a DishPro Single LNBF (a Dual will also work - Twin/Quad will NOT). DishPro splitter goes right where the 2 TV feeds come together. It's similar to a standard one, but do NOT try to cheap out - the difference is in how it handles DC power.
Now, in between the DP splitters output and the receivers, add conventional 2200MHz Satellite/ VHF-UHF Antenna diplexers. The antenna side of the diplexers goes to a conventional VHF-UHF antenna splitter. The other side of that goes to the antenna's power injector, and off to the roof.
Now, at the receiver ends, you put diplexers to break the antenna feed away from the satellite feed, and plug them into their respective connectors. Good to go!
The biggest downside of all this is the number of little boxes to be stuffed into the wall, but it'll give you total flexibility in use - one TV can be watching local OTA and the other can be watching satellite. No idea how much space is there, but there's always a solution for such things - like a plastic wart on the outside wall to hold the stuff.
I know this sort of text instruction can be hard to follow. Maybe you could try sketching it from the text to help it make sense. If not, I'll TRY to draw something for you.
