Corndog,
We had a Modcon FF, there were no real trouble However, if you have a look at the pic above, you will see that they are longer from the front of the drawbar [and the rear tyres on the tug] to their wheels meaning that there is potential for getting "hung up". Especially with bits hanging down like steps & stabilizer legs. This can also lead to the Ball Weight being higher, putting extra strain on the tug's suspension.
That said, we didn't have any issues... personally the best thing with FF's is that "If you can park it, you can sleep in it".
All the best
Hem