I have the dual cam HP version, and that bolts to the frame.
If your bars have the bend at the end, they are the newer style and you won't have to get new bars if you go to the dual cam.
Looking at your Airstream though, it's not a real long one....friction may be a better bet for a 19 footer. I had a 19 foot 2003 and the friction did very well with that unit. I couldn't imagine going up to a dual cam if I still had my 19' FWIW..... 22' would still fall under the friction in my book.
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