Invest in a good travel bag - you will reap the cost back many times over.
I have a Naish Golf bag which has copped a beating (especially on discount airlines - I'm looking at you RyanAir) and the gear is still good inside. It's also saved me excess baggage charges. Staff have looked at it, looked at me, said "checking in your golf clubs sir?" To which I have always replied, "Yes thank you!"
Pointers:
1. Remove the fins - I didn't the first time and they made cuts in my bag.
2. Put your wetsuit and towel down first.
3. Place harness on top of board, then bar. I don't use the outside pocket - I came into Perth Airport with my bar hanging out (and nobody needs to see that

)
4. Lay your kites in the top section, out of their bags. Just roll them in wingtip to centre. Make sure you leave all the valves open.
5. Don't pack a pump unless you are going to uncharted kite lands - you can always borrow (And in some places like Mauritius, my room came with a pump!)
6. Take your clothes carry on. You won't need many clothes because you'll be kiting all day right? Just take one set of clothes for going out, because who cares if you wear the same thing every night.