My 21'er is on a roller trailer... I rarely power load the thing, but still do minimal winching. I back the trailer in so that the back set of rollers are just barely breaking the surface of the water and drift the boat on with the help of a looong rope. I get the bow within a foot or two of the winch, hook onto the bow eye and in just a few cranks its tight to the winch stand. Quick and easy, even when I'm alone.

I was always told you should take no more than two minutes at the ramp. That time limit helps keep the line moving along and no one gets testy. LOL. I would think an electric winch would slow the process down instead of speed it up, no?