When it was the old Orange and Black North Sea Ferries they had leg winders, so the dock spotters backed under a trailer, a man removed the ships trestle and wound up the legs while the driver connected the airlines, then in the import lanes another man wound down the legs as the driver undid the airlines.
I have never been one for running with raised suspension as it stretches air bags or buggers up load sensor / abs valves in my opinion, rightly or wrongly.