G Doc –
Fishing alone with a manual downrigger is challenging. What I’ve found to work best for me is to keep the boat in gear – very important – that helps keep the slack out of the line and keeps the fish from running all over the place, i.e. under the boat, around the engine, around the cable, etc. It also gives you some time to crank up the cable. Also, turn the boat in a large circle away from the side that has the DR mounted on it. That helps keep the fish on the side away from the DR. If the fish behaves you can net it with the cable still in the water.