They came with flags - usually the Australian one, occasionally the Union Jack. They walked and they came in wheelchairs and on crutches. Kids came in gaggles - singing Advance Australia Fair. Others brought an alpaca. Some, including the alpaca, wore paper crowns.
Some brought Tim-Tams and gave them to the King and Queen. The donors said they liked to think that the chocolate biscuits would be welcome relief when the couple got back in the car to parliament (though the biscuits might have melted in the hot spring sun).