Here is an idea we used at a steering course regatta many years ago.
It is 2 canals (each a length of timber) but mounted as a VEE of about 60 degrees. They point into the bank. At the bank there is a soft point on the bank, length of soft foam etc.
The idea is to sail in through one canal nuzzle up to the bank with bow on soft part. Then using forward on the motor and the rudder over until the boat has swung over and orientated itself to go in reverse and back down the other canal.
The inner lengths of the canals need adjusting for the lengths of the boats running.
This is an advantage to longer boats.
good luck, Roy