My wife and I once approached a boat ramp at the end of a dead-end street. There were fences on both sides of the street and a huge oak tree in the center of the swing-around. I stopped and looked over the ramp approach and studied the two ways to pull around to line up with the ramp. As I made the 180 degree turn my boat didn't clear the oak tree. I got out and knew I would have to uncouple the trailer. But I was on a downward plane to the ramp and fearful if I uncoupled the trailer it would roll into the river and I wouldn't be able to stop it. No other people were around to help me. There was no way to back up without making it worse. I uncoupled the trailer and pulled it by hand parallel to the river for about two feet. Then I backed my truck up and re-connected the trailer and was able to pull it out. The next time I approached the same ramp I decided to circle the tree from the other side. I drove as far as I could to the river, I was also right up against the fence, and I stopped. I then turned my wheels to the left as far as they would go. Then I started slowly going forward and I just made the turn, with no room to spare, and lined up to the ramp.