If backing into a slip is contrary to your boat's prop walk, use your available space to gain sternway and steerage, then continue with idle Reverse until you have the momentum (in Neutral) to get the stern into the slip. Focus on getting one stern quarter just inside the piling. Don't stop the boat part way, because re-engaging Reverse will cause prop walk to skew the boat.
![](https://i.ytimg.com/vi/wLPEdlwMalo/maxresdefault.jpg)