When I put the boat on the trailer and run it up to the bow stop, kill the motor, step up to casting deck, boat slides away from bow stop. Should I leave the motor running and in gear, hook the strap and tightened it down then kill and raise motor? I power load but down like to have thrash my motor getting up on the trailer. Still looking for that happy medium of how far to back trailer in the water. Seems like it's a very fine line.