In flying suit, suitably briefed and tooled up with gizzits/info they would at least give the public a focal point on the day.
Ah but that's classed as "recruiting" as you're not allowed to do that unless you've done the course at Cranwell. Seriously.
It's lest some spotty oik gets to OASC, gets turned down on Day One then pipes up "But some bloke told me......"
Apparently we're all too stupid to include the caveat "...but ideally you'd need to check with your local AFCO" with the reply to any enquiries.