It's a kite event... Need we say more?
Come as you are, assuming you have good personal hygeine... Bring kites, and be prepared to meet a whole bunch of amazing kite makers and fliers.
Everyone is friendly, and quick to share their latest tips on this or that.
As for kites on a plane... I travel with a "SKB Standard Golf Case", hard shell with wheels on one end. I just check 'em in and if they give me any grief about the size or weight, I say it's sporting equipment... That usually satisfies them.
In lieu of a hard case (which I only got recently), a good roll up bag should be fine as long as there are a lot of rods in there... If you have 10 kites all rolled up (maybe even with an added spine of sorts) the whole package is quite strong.
While I've heard from a lot of kiters about the occasional rod being broken by handlers, I haven't had anything more than small tear in the bag itself.