I normally launch at Wick, Mudeford or Portland so, no problem. I avoid Baiter like the plague. However, when I have, I push the trailer in far enough to float the boat onto it and secure it then use a long rope to tow the trailer out with the car.
Rob, its all right for young fellow me lads like you to lightly talk of hand winches, I've used mine for years but, when you get to a certain age, the easy option seems to get more attractive.
Using the car to pull the boat onto the trailer is VERY difficult as when the weight of the boat loads onto the rear of the trailer, the front end flies up in the air and you will need a very weighty crew to pull it back down.