We have a 25rr and have a similar issue. I just ended up running coax to the br through the cabinets and over the door. It's not the prettiest but it works. If they don't have the backer board with the sticker then I wouldn't try and mount a tv at all to the wall unless it's to the side of a cabinet that you can get behind and put in support ( inside a cabinet). With all the traveling I'd think it'd work itself loose. We just use the stand and lay it on the bed during travel. I'm betting that's not what you were hoping for.
Eventually I'd like to build my own cabinet in the br and work the mount in that way.
My two cents fwiw.
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2012 Ford F-150 EB 3.73
2015 Forest River 25RR
2004 Honda GL1800