Use neutral...... after gaining momentum moving backwards shift into neutral. Be prepared to shift back into reverse when you have lost your reverse momentum.
Using this method, I find that I have much more contol of the boat and that once in neutral, all effects of prop walk are eliminated.
Not all boats act the same, and I can not speak specifically about the PS, I have no idea if your boat will act the same, but I have to believe that this will give you more control. Strong winds are a pain to deal with.
Courtney is My Hero
If a man is to be obsessed by something, I suppose a boat is as good as anything, perhaps a bit better than most - E.B. White