Exclusive!

So, four plane-loads of Exclusive Brethren have swollen Invercargill's numbers for the weekend and questions are being asked by the interested and the disinterested alike: Why here, why now and other such questiony questions.
Claims are being made too.
Most mysterious of those is that from Invercargill 'Exclusive", Peter Hickmott  who said,
"We had to get people here at short notice and this was easiest", referring to the use of the four planes.
"Short notice"? I thought to myself. Has something come up? There's been talk of the Rapture on the blogs over the past couple of days. Were those usually non-prophetic commentators onto something? There's a national Bible conference being held in the city this weekend - is there a connection here, that I'm not seeing?
"Short notice", though. It has me puzzled. Has someone spotted something in the Good Book that had been overlooked for centuries? It could be a revelation of some sort. "Short notice". Maybe some other town cancelled, but who would dare? Maybe they shift their meetings around, the way the Americans do with whatever they don't want to have recognised as a target. Who would target the Exclusive Brethren? The Inclusives? Is there bad blood? Not enough has been written about this "conference", I'm thinking.
Here's one last thing to ruminate on:

" There were two jets, a Challenger and a Cessna Citation, and two smaller prop-driven aircraft, but she  Invercargill Airport general manager Chloe Scala) was unable to comment on who was on board."

"Unable to comment" eh!
Why's that then, do you think?