I've been travelling with my rig recently and most vigilant check in staff won't let me take it on as hand luggage - due to the lines posing a threat as a weapon, apparantly. What a load of bollocks! Soon we'll all be travelling in the nude if things continue as they are. Anyway, you're best buying a hard shell case and chuck it in the hold, I've seen people do this with tandem rigs as well so you could probably fit gear and clothes in together.