Sorry, but I'm seeing a lot of poor attitudes here behind the wheel of an RV.
Regardless of what the driver is doing in the fast lane, you DO NOT have right of way when changing lanes... they do. They do not have to give way to you, or "let" you in. Idiots force the issue as they don't want to lose momentum... well, the other driver doesn't want to lose momentum by getting stuck behind a billboard when they have the right of way.
And people wonder why sometimes RV drivers get a bad rap or people think that we should absolutely have to get a special license to drive one.