Don't write off 1:350 scale
ISW offers dock sections with rolling stock.
http://www.commanderseries.com/accessories.html
I believe that the Resin Dockyard of Canada either has, or will have soon, dock parts too.
I've always wanted to do a dock scene where a cargo ship was onloading an armored brigade. You would'nt need a dock crane as cargo ships (AKs or Liberties) could handle it with their own booms.
Other dock thoughts in 1:350 - a fresh from the yard DD or DE undergoing inclining tests or provisioning from freight cars