This is how I have been doing it for many years. I just leave the boat hooked up to the winch strap as I back it in the water. I back up just enough that the boat floats and I can easily push it off the trailer. I step up into the bed of the truck using my tire and pulling myself up with the bed rails of my GMC truck. I step down out of the truck bed onto the trailer tongue and balance myself by holding on to the front of the boat. I lean down and unlatch the winch strap and pull the strap out some giving it some slack. I reach up under the boat and easily undo the winch strap from the boat because of the slack. I get into the boat and quickly troll over to the dock. I tie up the boat and quickly go back to the truck and park it. I am very fast at doing this. The only issue is that you have to balance on the trailer tongue while you unhook the strap. I have thought about making some type of plate that would mount to the side of the trailer tongue to give more of a standing area so I don't have to balance myself as much. Any ideas on what type of plate to make? Anyway this works well for me, but I am not sure I will be able to do the same thing when I get older. The balancing can sometimes be a little tricky. That is why a plate would help so much.