Small boat/jet ski trailers can be a hassle backing up, with any RV. The problem is by the time you see them in your side mirrors, you've probably already jack knifed the trailer.
I imagine a rear view camera would help a lot with that issue. Many years ago I had an 11' or so hard bottom inflatable, that was just about impossible to back up with the Class C I had at the time (without a back up camera).
I've launched from 18' up to 25' boats behind Cs without any problems.