The only reason that I will keep it in gear while securing the bow is because the boat will roll back down off the rollers if I turn off the engine. I put the boat shift in neutral position first and see if it will stay on the trailer.Ok gotcha. Yes I have a dock and this is how I usually load up my boat but dont powerload.....yet. Do you leave the boat in gear at idle? Like trolling speed? Or with a little more rpms?
If is starts to slip backward, I bump it forward then leave it powered on. The boat will dictate how much force is needed if that makes sense.
On some days the boat will stay put and then I can turn off the motor. Really depends on the dock and angle of the launch.
On a few occasions I have shut down the motor, and as soon as my body weight goes backward, the boat starts to roll too, so I had to scramble and re start the engine, power back on the trailer, and leave it in gear.