Not hard. Just have to remember the trailer tracking inside on tight turns. I rode the inside wheel up a curb on one.
The neatest thing was doing a very tight u-turn from a stop. I essentially jack-knifed the kayak, and it stopped and started reversing away from the bike as I rode past it, then it stopped again and started going forward behind the bike once I'd gone past the 90 degree point. Bad description - you'd have to see it.
PS - boat tail on a bike - funny