I need to try this rope method once.
I'm solo 99% of the time... right before backing in the water, I drop the tail gate, and loosen the winch line but leave it attached to the boat..
I back in til the rear floats, then climb on my tire, into the bed, across the tailgate, into the boat.. verify the engine starts, reach under unhook the winch line, and back off... tie the boat up, move the truck..