G'day mate i do all the above plus put a chain through a wheel and chain it to the spring and reverse my trailer in to the parking spots and make sure the trailer wheels are hard up against the gutter, it makes it very hard to release the hitch when the is pressure on it.It might sound like a bit of overkill but i can't imagine what it would be like to come back to the ramp and find my trailer gone.Apart from the many thousands of dollars to replace it i can imagine it would be a right royal pain in the a$$ to find somewhere to put the boat while i sorted it all out.