I was surprised at how easy my 31' Mallard was to back up. Prior to it, the only thing I'd ever backed up was a Boler that was basically a bed on wheels (Maybe 10' long) and a truck box mounted to a hitch used as a utility trailer. Both those things were a PAIN to reverse. As soon as they started to turn they'd be jack-knifed.
First time I ever reversed my 31' I didn't even have to pull forward, I was bloody surprised with myself. Having the wheels that far back I find makes it a lot easier.