How about using something like a Wi-Fi Ranger... If the RV-port is close enough to your Sticks and Bricks it will connect to the HOuse router, Then it brings the Signal inside the RV and "Re-Routes" it to devices therein.
I actually did this (But with Cat-5 not the Ranger) when I still had a S&B Was the easiest way to get Wi-Fi into the RV
Oh, I ran a Cat-5 to a portal and hookup there with a double female connector. This works if I'm in a place with Wired internet,, or when I hang my Wireless Game Adapter OUTSIDE (Upgrading to a proper outdoor unit later this year). Works great but the 15 year old WGA (linksys WGA-54G) is getting a tad long in the diodes. so I want a new "Wi-Fi Ranger" type outdoor unit.