I don't have a deck, but I drive buses with a lot of tailswing. You sort of get used to it, but you always have to watch. Remember, any vehicle has tailswing if you're close enough to something (I've seen close calls with cargo vans).
The easiest way to find out how wide your tail swings is to go in a parking lot somewhere, get your tires right next to the curb, cut it all the way in the other direction, go forward about 20 feet, then get out and look.
You have to always be thinking about it. When you're approaching a turn, look at what you're going to be next to. On multilane roads, sometimes I try to time it to get my tailswing between two cars in the next lane, but that can be tricky. Another thing you can do is get those plastic bumper guides that stick out at an angle, they look funny but think of them as training wheels.