I watched a couple of guys launch a huge center console with triple motors there a few weeks ago. The truck was bigger than a pick up (some type of tractor trailer style). They had no problem. It appeared they've done it many times and had the routine down pat.
They didn't use the walkway. One guy stayed in the boat as the trailer was backed into the water. He fired up an engine(s) and backed the boat off the trailer and motored over to the docks.