The tongue won't be long enough to clear the cabover portion of the camper.
RV dealers that sell camper use a small trailer to do exactly what you want to do, but there trailers a specially built with a really long tongue.
I saw another such trailer when I was delivering an RV (travel trailer) to a dealer in Kalispell, MT Thursday, but I didn't think to take a picture of it.
I have another delivery planned for Monday to a different dealer, so I will look around and see if I can find the trailer they use.
One key factor is the CG (center of gravity) MUST be forward of the axle.
In my travels doing RV transport, I've seen the trailers used by drivers who deliver Arctic Fox campers... pretty interesting trailers. It's a tandem axle job with a tongue that must be 6-7' long.
