[QUOTE=MacMillan of Rathdown;1081310]
Having recently hosted a member of the royal family at the Greenville Scottish Games I think I am on firm ground when I suggest that the Royals do not wear kilts outside of Scotland, even when attending Highland games, much less if invited to a senior prom.
QUOTE]

HRH was probably traveling with carry-on luggage only to avoid those extravagant checked baggage fees. I am sure that if his travel budget had allowed he'd have been in full feather.