I made two improvements to my launching and loading. The first is how I handle the line when launching alone. The line has a clip on one end for attachment to the bow eye, and a loop which slides over the step.
The line is stowed on the winch stand and tongue. There are two lines in the images which illustrate the stowed position and the launch position. The line is stowed on the winch stand and tongue, secured by bungee loops and balls. I remove the line from the winch stand and clip the line to the bow eye and slide the loop over the step. It can be seen in the lower picture. I put the coiled line in the plastic bowl. It is the bottom of a plastic barrel, which is secured to the trailer frame with heavy duty cable ties.
This barrel happened to be red. I coated it with a Rustoleum rubberized black paint, the sanded the top edge, exposing the red plastic. It sort of matches the red pin stripes on the trailer.
One important thing. Make sure the coils of the line are oriented so the boat pulls the line off top of the coiled line.
I like a long line, fifty to sixty feet. I also prefer polyester or dacron to nylon. Nylon is stretchy, which tends to slingshot the boat. I prefer to float the boat off the trailer as opposed to backing up quickly, then braking to slide the boat off the trailer. I'll back the rig until the boat is floating. I then pull the trailer from under the boat. If the boat moves when I start forward, I'll back up further, until I can pull the trailer from under the boat without moving the boat.
The winch is a Fulton F2 (two speed) which replaces the winch that came with the rig. Got it from Amazon. The price was about 125 bucks plus sales tax if it applies. If I knew then, what I know now, I would have replaced the winch before I even used the boat. Massachusetts does not allow power launching and there are some ramps that require you to drag the boat onto the trailer. Yes, if you don't mind getting into the water, you can easily winch the boat onto the trailer. But this winch can drag the boat onto the trailer and you don't have to strain when the winch is in low gear.
I bought this winch because I stripped the handle from the shaft loading on one of the difficult ramps.