Yes but I believe your swm splitter has to have a power source.
I don't believe you will be able to use second receiver in bedroom if you are using internal coax wiring in the rv. The coax has to be straight shot from swm splitter to receiver with no splitters in between. You would be better off running coax through Window to second receiver. The onlyrv wiring that will work is the satellite prep connection on the outside that usually goes to main living room TV (if your rv is equipped with satellite prep. If not you are best just running through windows or slide seal areas.