Hi,
I am running the Küat Transfer V2 in the dedicated 2” hitch version and in the 2 bike configuration.
According to manufacturer this rack is Camper Trailer safe and "can be directly mounted on campers, recreational vehicles, or trailers with CHASSIS MOUNTED RECEIVERS ONLY".
https://www.kuat.com/product/transfer-v2/
I have added the Hitch extender as proposed from @BB_TX and it works great in combination with a hitch anti rattle clamp.
Thanks,
Mike