The ARR makes sure everything is tagged for the cruiselines & seperates the luggage.
Holland America & Princess uses their own luggage trucks to move the luggage to the Port. They use their own employees to load the luggage. Company Reps are present for their trains. Usually not present for the ARR trains, until the Luggage Crew arrives to load the trucks.
All other Cruise Lines use Premier Alaska to move passengers & luggage. They have their trucks & luggage crew.