I always have a bow rope attached to mine. When launching alone, I make a loop and hook it on the dock somehow. I backup and hit the brakes, sliding the boat off the trailer. It usually takes 2 times to get it all the way off, then I pull up and secure the boat, then park.
Loading is a bit easier now. I just point the bow towards the trailer and power load. I used to think it had to be straignt on the rollers each time, but I was wrong. After messing with trying to get it straignt for about 10-15 minutes one day and people were waiting, I got mad - got out of the boat and went to the bow. Apparantly, the bow only weighs about 100 lbs or so, I can lift it up and center it by man power. So now loading is a lot easier, just pull in, mostly power it to about 12 inches from the bowstop, then 'Will power" the bow onto the center rollers, the rear will settle on the roller sif I am deep enough in. Takes no time at all any more.
Will